Frozen-in gravity: A new way to understand the evolution of spacetime dynamics

The concept of spacetime, first described in Einstein's theory of general relativity, has since been widely studied by many ...
Tech Xplore

Programmable 3D-printed filaments mimic artificial muscles with heat-driven bending and twisting

Nature is replete with slender filaments that bend and coil—from climbing grape vines, to folded proteins, to elephant trunks that can pick up a peanut but also take down a tree.

Sanctioned Chinese AI Firm SenseTime Releases Image Model Built for Speed

With US restrictions limiting its access to advanced tech, SenseTime is doubling down on open source with a new model ...
IEEE

Design of Improved Finite-Time Composite Controller for PMSM Servo System Under Position and Speed Single-Loop Structure

Abstract: The conventional position servo system usually adopts the position-speed-current three closed-loop control structure. Although each loop variable can meet the expectation, the bandwidth of ...

Time-evolving polymer recreates nature's signature twist

Science has long taken inspiration from the natural world, and few natural designs are as iconic as the helical shape that ...
IEEE

A Monolithic D-Mode GaN-Based Buck Converter With Novel Resistor–Capacitor-Multiplexing Dead-Time Adjustment Structure for Envelope-Tracking Power Amplifier Application

Abstract: This letter reports a monolithic high-efficiency buck converter using all depletion-mode (d-mode) gallium nitride (GaN) HEMTs which integrates a dead-time generating driving circuit and a ...