Results 111 to 120 of about 25,660 (250)

Experimental Analysis of a Coaxial Magnetic Gear Prototype

Machines
Magnetic gears are becoming promising devices that can replace conventional mechanical gears in several applications, where reduced maintenance, absence of lubrication and intrinsic overload protection are especially relevant.
Stefano Lovato, Giovanni Barosco, Ludovico Ortombina, Riccardo Torchio, Piergiorgio Alotto, Maurizio Repetto, Matteo Massaro   +6 more
doaj   +1 more source

The detection of gear noise computed by integrating the Fourier and Wavelet methods [PDF]

, 2008
This paper presents a new gearbox noise detection algorithm based on analyzing specific points of vibration signals using the Wavelet Transform. The proposed algorithm is compared with a previouslydeveloped algorithm associated with the Fourier ...
Forcelli A., NIOLA, VINCENZO, Quaremba G.   +2 more
core  

Timing Is Everything: How Subtle Timing Changes in MRI Echo Planar Imaging Can Significantly Alter Mechanical Vibrations and Sound Level

Magnetic Resonance in Medicine, Volume 95, Issue 6, Page 3116-3130, June 2026.
ABSTRACT Purpose Echo‐Planar Imaging (EPI) is central to fMRI, diffusion MRI, and many dynamic clinical applications, yet rapid gradient switching induces strong mechanical vibrations, generates acoustic noise, and contributes to ghosting artifacts—effects that intensify at ultra‐high fields.
Amir Seginer, Alexander Bratch, Shahar Goren, Edna Furman‐Haran, Noam Harel, Essa Yacoub, Rita Schmidt   +6 more
wiley   +1 more source

Identification and proposed control of helicopter transmission noise at the source [PDF]

Helicopter cabin interiors require noise treatment which is expensive and adds weight. The gears inside the main power transmission are major sources of cabin noise.
Coy, John J., Coy, John J., Handschuh, Robert F., Huff, Ronald G., Karchmer, Allan M., Krejsa, Eugene A., Lewicki, David G.   +6 more
core   +2 more sources

Field‐Data‐Based Wind Turbine Reliability Modelling: Quantifying Effects of Operating Age, Design and Technological Development

Wind Energy, Volume 29, Issue 5, May 2026.
ABSTRACT As wind energy continues to expand, ensuring the reliability of wind turbines is critical for optimising operational efficiency and minimising downtime. Based on maintenance data from over 1,000 onshore and offshore wind turbines covering more than 4200 operating years, this study presents an analysis of wind turbine failure behaviour over ...
Julia Walgern, Fraser Anderson, Athanasios Kolios, Katharina Fischer   +3 more
wiley   +1 more source

Low-noise, high-strength, spiral-bevel gears for helicopter transmissions [PDF]

Improvements in spiral-bevel gear design were investigated to support the Army/NASA Advanced Rotorcraft Transmission program. Program objectives were to reduce weight by 25 percent, reduce noise by 10 dB, and increase life to 5000 hr mean-time-between ...
Handschuh, Robert F., Henry, Zachary S., Lewicki, David G., Litvin, Faydor L.   +3 more
core   +1 more source

Unraveling Chronic Pain: From Mechanisms and Risks to Diagnosis and Treatment

MedComm, Volume 7, Issue 4, April 2026.
Chronic pain arises through distinct molecular pathways categorized into nociceptive, neuropathic, and nociplastic types. Nociceptive pain begins with TRP channel activation in peripheral nociceptors, signaling via Aδ‐ and C‐fibers through the spinal dorsal horn and spinothalamic tracts to the brain, regulated by descending inhibition and involving ...
Xiaofeng Dai, Chongxiang Wang, Ping Jiang, Xiaopeng Mei   +3 more
wiley   +1 more source

A Human Powered Micro-generator for Charging Electronic Devices [PDF]

, 2018
A hand-pulled generator has been designed and tested. A preliminary result has been obtained and discussed. This device was created to provide outlet-free charging. Electronic devices are useful when going out into the wilderness. A portable power supply
Adam, John
core   +1 more source

Weibull‐Neural Network Framework for Wind Turbine Lifetime Monitoring and Disturbance Identification

Wind Energy, Volume 29, Issue 4, April 2026.
ABSTRACT Wind turbines are vital for sustainable energy, yet their reliability under diverse operational and environmental conditions remains a challenge, often leading to costly failures. This study presents a novel Weibull‐Neural Network Framework to enhance wind turbine lifetime monitoring by estimating reliability (R(t)) and mean residual life (MRL)
Fatemeh Kiadaliry, Sadigh Raissi, Alireza Rashidi Komijan   +2 more
wiley   +1 more source

Alumina–Zirconia Composite Filaments for 3D‐Printed Scaffolds With Bioglass Infiltration for Medical Applications

International Journal of Applied Ceramic Technology, Volume 23, Issue 2, April 2026.
This study demonstrates the innovative development of alumina–zirconia composite scaffolds produced by fused filament fabrication (FFF) and infiltrated with bioglass via the sol–gel method. The combination yielded highly porous three‐dimensional architectures (500 µm–1 mm), suitable for nutrient diffusion, vascularization, and cell colonization.
Maíra Faccio, Natália Fontana Nicoletti, Bruna Lins, Diego Pires Gurgel, Janete Eunice Zorzi, Jadna Catafesta   +5 more
wiley   +1 more source