Abstract: A varactor-tunable second-order bandpass frequency-selective surface (FSS) for microwave frequencies is presented in this article. The FSS is composed of three stacked metallic layers. The ...
Like every authoritarian before him, Trump is working to co-opt news sources and control what the public sees and hears. Too many corporate outlets are bending the knee—but not Common Dreams. We will ...
A federal judge on Sunday temporarily blocked the Trump administration from sending any National Guard troops to Portland – a ruling which came as the administration stepped up attempts to send out-of ...
Abstract: This paper presents a speed estimation scheme by combining a second-order sliding-mode observer (SMO) with the model reference adaptive system (MRAS) in the sensorless-vector-controlled ...
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