T HE art of producing, detecting, and modulating ultra-high-frequency electric oscillations has reached the same state of development which was attained in early work on lower frequency oscillation
T HE vacuum tube oscillator is fast becoming one of our most versatile circuits and the requirements which are being imposed upon it are constantly increasing in severity.
HE three types of oscillation generators which at present are the most efficient in the range from 100 megacycles to 3000 megacycles per second will be discussed in the following survey.
The cost of an interruption in service and of replacing a submerged repeater in a multi-channel telephone submarine-cable system places high importance on the reliability of all parts of such repea
The optical constants of evaporated MgF2 films were determined over the wavelength range of 1050 to 1600 A from measured transmittance and near- normal-incidence reflectance measurements.
In optical emission from electrons confined to two dimensions, the component with polarization normal to the planes was observed to be unexpectedly strong.
High resolution Mn K-beta emission spectra provide a direct method to probe the effective spin state and charge density on Mn sites.
Mn K-beta x-ray emission spectra provide a direct method to probe the effective spin state and charge density on the Mn atom and is used in an experimental study of a class of Mn oxides.
We present transport and thermal data for the quadruple-perovskites MCu3(Ti1-xRux)(4)O-12, where 0 x 1. A metal-insulator transition (MIT) Occurs for Ru concentrations x similar to 0.75.
This paper reviews simple valence concepts that have relevance to semiconductor and metal clusters.
