Astronomers from Bulgaria and Egypt have performed multi-wavelength observations of a well-known blazar designated S5 ...

An international research team led by the Helmholtz-Zentrum Hereon has, for the first time, succeeded in visualizing and ...

A phase change in post-perovskite materials at the so-called D” discontinuity is also evidence for long-predicted slow, convective flows in the mantle itself ...

On July 7 1961, the U.S. Air Force launched a satellite called Discoverer 26 into orbit with a classified payload. On July 7, 1961, the U.S. Air Force launched a satellite called Discoverer 26 ...

In this paper, we propose a longitudinal-slot substrate integrated waveguide leaky-wave antenna with low-side-lobe-level (SLL). The antenna consists of two rows of longitudinal slots, which are used ...

An ultra-low power adjustable triangle wave generator with a multi tunable amplitude and frequency is introduced in this paper. The proposed circuit consists of a Schmitt trigger and a current source.