Results 81 to 90 of about 56,791 (219)
Light‑Driven Propulsion of Graphene Aerogels in Microgravity
Advanced Science, EarlyView.Ultralight graphene aerogels convert laser light into thrust. Parabolic‐flight experiments directly compare their motion in microgravity and at 1 g, revealing order‐of‐magnitude enhancements in distance, velocity, and transient thrust when weight and friction are removed (∼50 times enhancement).
Omnia Khattab +10 more
wiley +1 more source
Topological Materials and Related Applications
Advanced Electronic Materials, EarlyView.This review covers topological materials—including topological insulators, quantum valley Hall and quantum spin Hall insulators, and topological Weyl and Dirac semimetals—as well as their most recent advancements in fields such as spintronics, electronics, photonics, thermoelectrics, and catalysis.
Carlo Grazianetti +9 more
wiley +1 more source
Optimization and Experimental Testing of the Drag Torque Model Based on the Cavitation Effect
Jixie chuandongIn the non-braking operation of the wet brake in a heavy vehicle's hybrid power transmission system, the friction pair produces a drag torque due to the power loss caused by the viscous action of the oil.
Li Jie +3 more
doaj
Characterization of the Drag Force in an Air-Moderated Granular Bed
, 2009 We measure the torque acting on a rod rotated perpendicular to its axis in a granular bed, through which an upflow of gas is utilized to tune the hydrostatic loading between grains.
Brzinski III, Theodore A +1 more
core
Unzipping Dynamics of Long DNAs
, 2002 The two strands of the DNA double helix can be `unzipped' by application of 15 pN force. We analyze the dynamics of unzipping and rezipping, for the case where the molecule ends are separated and re-approached at constant velocity.
A. Sarkar +32 more
core +1 more source
Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.This review aims to provide a broad understanding for interdisciplinary researchers in engineering and clinical applications. It addresses the development and control of magnetic actuation systems (MASs) in clinical surgeries and their revolutionary effects in multiple clinical applications.
Yingxin Huo +3 more
wiley +1 more source
Modeling of the Dynamics of Conical Separate Plates in a Wet Multi-Disc Clutch
LubricantsWet multi-disc clutches in transmission systems suffer from the incomplete separation of the friction components, which raises the drag torque and results in power loss and heightened fuel consumption.
Qin Zhao +5 more
doaj +1 more source
Signal and power roll ring testing update [PDF]
The development of the roll ring as a long-life, low-torque alternative to the slip ring is discussed. A roll ring consists of one or more circular flexures captured by their own spring force in the annular space between two concentric conductors or ...
Smith, Dennis W.
core +1 more source
Microfluidic Mixing with the Dynamic Control of Magnetic Actuation
Advanced Intelligent Systems, EarlyView.Schematic illustration and flow field visualization of magnetically actuated L‐shaped microrobots displaying cooperative vortex generation for enhanced microscale mixing. The left side shows the electromagnetic actuation setup, which enables programmable control of rotational direction and frequency.
Prashant Kishor Sharma +2 more
wiley +1 more source
Drag Reduction Control for Torsion and Oscillation in Top Drive System Slide Drilling
Shiyou jixie, 2018 The domestic technology of drag reduction control for torsion and oscillation in top drive system (TDS) slide drilling is not yet mature. The torque limit and torsion angle during drilling are still set by experience, which is inconsistent with the ...
Li Qian +5 more
doaj