IEEE

Angle-Selective Surface Based on Frequency-Selective Surface Using Compact Double-Layer Patch-Coupled Resonance

Abstract: In this letter, a new miniaturized dual-polarized angle-selective surface (MDASS) design is proposed using a compact double-layer patch-coupled resonant frequency-selective surface (CDPR-FSS ...
IEEE

Frequency Estimation for Energy Rate-Based Forced Oscillation Source Identification Using Its Properties on Modes Decomposed by Matrix Pencil Function

Abstract: Forced oscillation (FO) source identification prevents the impending threat to power system security. This article proposes a methodology to accurately estimate FO frequency for source ...
EDN

Using an oscilloscope’s time, frequency, and statistical measurement domains

Multiple domains provide designers and test engineers with complementary views of acquired signals. Oscilloscopes originated as instruments that measure electrical signals in the time domain. The ...
NPR

Trump is using California's routine vote counting to push fraud allegations

Several California races remain uncalled as millions of ballots still need to be counted. All regular occurrences — and all fodder for President Trump's claims it's a sign of election fraud. The LA ...
PBS

Use a Deck of Cards to Practice Counting and Sorting

Whether we are planning a meal or organizing the contents of a desk, counting and sorting are math skills that we use every day without much thought. Preschoolers need these basic skills to lay the ...