125 Math Trivia Questions for Kids and Adults

If you're looking for a way to make your next get-together with family and friends more fun, engaging and even educational, ...
BBC

What are square numbers?

Which is 9. So 9 is a square number. Here are some other examples of square numbers. Can you see how all these numbers can be arranged into a square? Which is 64. So 64 is a cube number. Here are some ...
IEEE

Local Stability Analysis for Uncertain Nonlinear Systems

Abstract: We propose a method to compute provably invariant subsets of the region-of-attraction for the asymptotically stable equilibrium points of uncertain nonlinear dynamical systems. We consider ...
Frontiers

Ultra-Wideband Vertically Polarized Omnidirectional Antenna With Dual Metal Loops

1 School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, China 2 Guangdong Institute of Metrology, Guangdong Provincial Key Laboratory of Modern Geometric and ...
IEEE

A 2.4-GHz 1.5-mW Digital Multiplying Delay-Locked Loop Using Pulsewidth Comparator and Double Injection Technique

Abstract: In this paper, we propose a low-jitter low-power digital multiplying delay-locked loop (MDLL) with a self-calibrated double reference injection scheme. To reduce jitter, the noisy edge of ...
Frontiers

Electron magnetohydrodynamics Grad–Shafranov reconstruction of the magnetic reconnection electron diffusion region

We present a study of the electron magnetohydrodynamics Grad–Shafranov (GS) reconstruction of the electron diffusion region (EDR) of magnetic reconnection. Two-dimensionality of the magnetoplasma ...
PNAS

Positive basis for surface skein algebras

Edited by Lauren K. Williams, University of California, Berkeley, CA, and accepted by the Editorial Board February 15, 2014 (received for review October 8, 2013) ...