Results 111 to 120 of about 3,289 (243)

Beyond wound sealing: A dual‐functional adhesive nanofiber membrane promoting coagulation and osteogenesis in extraction sites

open access: yesBMEMat, EarlyView.
Inspired by the suction mechanics of octopus suckers, a dual‐layer nanofiber membrane integrates antibacterial protection, strong wet adhesion, and osteogenic support, offering a bioinspired strategy for effective hemostasis and alveolar bone preservation.
Huijing Ma   +9 more
wiley   +1 more source

Investigation of Silo Honking: Slip-Stick Excitation and Wall Vibration

open access: yes, 2011
Silo honking is an acoustical emission with a fundamental frequency of several hundred Hertz and an intensity often greater than 100 dB. It occurs when a silo is discharging and is similar to the 'honk' of a lorry horn.
Chavez-Sagarnaga, J   +6 more
core   +1 more source

Synergistically Accelerating Zn2+ Transport and Desolvation Through Cation‐Deficient Ion Channels in High‐Performance Zn Metal Batteries

open access: yesCarbon Energy, EarlyView.
The novel ITO protective layer enables ultra‐stable Zn metal anodes. By synergistically accelerating Zn2+ desolvation and Zn2+ transport via its unique structure, the ITO layer suppresses dendrites and side reactions. This results in exceptional stability for over 6000 h at 2 mA cm–2 and stable operation in Zn ||MnO2 full‐cell configurations.
Hyeongbeom Kang   +5 more
wiley   +1 more source

A modal method for the simulation of nonlinear dynamical systems with application to bowed musical intruments

open access: yes, 2008
Bowed instruments are among the most exciting sound sources in the musical world, mostly because of the expressivity they allow to a musician or the variety of sounds they can generate. From the physical point of view, the complex nature of the nonlinear
Inacio, Octávio José Patrício Fernandes Inácio
core  

Downhole Vibration Measurement, Monitoring, and Modeling Reveal Stick/Slip as a Primary Cause of PDC-Bit Damage in Today

open access: yes, 2010
Since backward whirl was discovered as a severe cause of PDC bit failure, our industry has made great strides toward creating whirl-resistant bits and operating practices. But is whirl still the major cause of PDC bit damage in today's applications? This
Olivier J. Hoffmann   +5 more
core   +1 more source

Enhancing hydrogen evolution reaction by harnessing bubble dynamics regulation: Principles, methods, and outlook

open access: yesDroplet, EarlyView.
Bubble dynamics pose critical bottlenecks to hydrogen evolution reaction efficiency, causing active site isolation, increased ohmic resistance, and concentration overpotential, especially at high current densities. This review comprehensively summarizes passive and active bubble manipulation strategies, elucidates their underlying principles, and ...
Ziwei Guo   +10 more
wiley   +1 more source

Analytical approximations for stick-slip vibration amplitudes

open access: yes, 2003
The classical "mass-on-moving-belt" model for describing friction-induced vibrations is considered, with a friction law describing friction forces that first decreases and then increases smoothly with relative interface speed.
Thomsen, Jon Juel, Fidlin, A.
core  

Analysis of Stick-Slip Characteristics of an Inclined Frictional Contact System

open access: yes
For the purpose of investigating the stick-slip characteristics of the inclined frictional contact interface, a three-dimensional numerical model of a slider-substrate inclined frictional contact system is constructed by using the finite element method ...
Liu, Shiyu, Wang, Zhiqiang, Lei, Zhenyu
core   +2 more sources

Stick-Slip Behavior of Torque Converter Clutch

open access: yes, 2005
Copyright © 2005 SAE International The chief objective of this paper is to study the non-linear behavior of torque converter clutch within the context of an automotive drivetrain.
Chengwu Duan, Rajendra Singh
core   +1 more source

An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system

open access: yesDeep Underground Science and Engineering, EarlyView.
The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand   +5 more
wiley   +1 more source

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