Fourier transformed amplitudes of the compressional waves
recorded between 9° and 91° (about 1000 to 10,000 km) epicentral
distance from Gnome, Shoal, Haymaker,and Bilby underground
nuclear explosions have been compared with Fourier transformed
amplitudes of P waves measured at distances between 9.0 and
1 3. 0 km from the explosions....
This study was set up to examine selected aspects of
the knowledge of welding metallurgy that is a part of the
background of present teacher educators who teach welding
courses for Industrial Arts majors.
Specifically this study was made to answer the following
questions:
1. What knowledge is now possessed...
Temporal variations in individual spectrum lines
emitted by a microwave discharge in pure helium are
investigated: The discharge is produced in a quartz tube
located inside of a section of waveguide which carries
pulsed 3 centimeter microwaves. The helium used is purified by a three-fold process consisting of treatment with...