Tuesday, September 19, 2023

Nanophotonics Flattens Smartphone Camera Bump


Tuesday, August 08, 2023

Optical Vectors Beam Multi-Bits

Optical communications—the backbone of the internet—use modulated lasers to transmit over a hundred different colored channels (using wavelength-division multiplexing) each with a hundred gigabits per second of speed. Multi-bit encoding modes—instead of just 1s and 0s—have been proven in the lab to increase throughput even further, but all suffer from errors introduced by noise in the channels, especially over free-space channels such as to satellites, submarines or even through living cells, according to researchers at the University of the Witwatersrand (Johannesburg, South Africa). Now Wits’ researchers have demonstrated a mode-division multiplexing (MDM) scheme using a quantitative measure for a vector (polarized) beam’s purity, its vector-quality factor (technically, its polarization separability) as the information carrier that can encode not just 1s and 0s, but countless modes of vector light that are virtually unaffected by channel noise.

Thursday, July 13, 2023

Automated Evolution Tackles Tough Tasks

Deep neural networks (DNNs) using reinforcement learning are getting harder to come by, due to sensitivity to the initial hyper-parameters chosen (such as the width and depth of the DNN, as well as other application-specific initial conditions). However, these limitations have recently been overcome by combining RL with evolutionary computation (EC), which maintains a population of learning agents, each with unique initial conditions, that together "evolve" an optimal solution. FULL TEXT

Tuesday, June 20, 2023

Keeping Hackers Off the Electrical Grid


Thursday, February 23, 2023

MXenes Shield Against Radar, RF, Stealth


Wednesday, February 08, 2023

Holy Grail of Batteries Obsolete Lithium Ion

Rechargeable batteries have become the lifeblood of electronics, enabling the mobile revolution. Unfortunately, today's rechargeable batteries incorporate flammable liquid cores. That could change soon, however by switching to rechargeable batteries that have solid cores with nothing to spill, nothing to catch on fire, nothing to potentially explode. FULL TEXT

Thursday, December 15, 2022

Bluetooth Hacked Yet Again


Tuesday, November 22, 2022

Artificial intelligence (AI)—in particular, machine learning (ML)— recently began to solve problems for which quantum computers are targeted, according to researchers at the California Institute of Technology (CalTech), the Flatiron Institute (New York City), and IBM (Yorktown Heights, NY) FULL TEXT