Results 11 to 20 of about 616,869 (305)

Quantitative Multiparameter Evaluation of Vacuoles in Intraocular Lenses Employing a High-Magnification Digital Microscopy Method

open access: yesJournal of Ophthalmology, 2019
As small imperfections with micrometric sizes, fluid-filled vacuoles, also referred to as glistenings, in intraocular lenses (IOLs) have been known to induce significant unwanted light scattering that in several cases presumably cause complaints and ...
Vincent Spiezio   +3 more
doaj   +1 more source

Design of an Automatically Controlled Multi-Axis Stretching Device for Mechanical Evaluations of the Anterior Eye Segment

open access: yesBioengineering, 2023
The young eye has an accommodative ability involving lens shape changes to focus over different distances. This function gradually decreases with age, resulting in presbyopia. Greater insights into the mechanical properties of anterior eye structures can
Kehao Wang   +7 more
doaj   +1 more source

Passive Attenuation of Mechanical Vibrations with a Superelastic SMA Bending Springs: An Experimental Investigation

open access: yesSensors, 2022
This work presents an experimental study related to the mechanical performance of a special design spring fabricated with a superelastic shape memory alloy (SMA-SE).
Richard Senko   +7 more
doaj   +1 more source

A Bi-Directional, Liquid-Spring-Magnetorheological-Fluid-Damper System

open access: yesFrontiers in Materials, 2019
The goal of this study was to demonstrate the feasibility of a novel fail-safe, bi-directional liquid spring, controllable magnetorheological fluid damper (BDLS-CMRD).
Nicholas Maus, Faramarz Gordaninejad
doaj   +1 more source

Magnetorheological Fluid Filled Spring for Variable Stiffness and Damping: Current and Potential Performance

open access: yesFrontiers in Materials, 2022
Magnetorheological (MR) fluid is a smart material utilized for semi-active damping devices thanks to its ability to become viscoelastic solid under a magnetic field and provide variable damping.
Stanislav Sikulskyi   +2 more
doaj   +1 more source

New Mechanical Knee Supporter Device for Shock Absorption

open access: yesMachines, 2022
Conventional knee supporters generally reduce knee pain by restricting joint movement. In other words, there were no mechanical knee supporters that functioned powerfully.
Hajime Shiraishi, Haruhiro Shiraishi
doaj   +1 more source

Mechanical Devices of the Spliceosome: Motors, Clocks, Springs, and Things [PDF]

open access: yesCell, 1998
We thank J. Thorner, J. Lorsch, and D. Herschlag for provocative discussions; J. Abelson, R. Luhrmann, T. Nilsen, and R. Reed for preprints; and G. Chanfreau, C. Collins, A. Frankel, A. Kistler, K. Lynch, S. Rader, B. Raumann, D. Ryan, C. Siebel, J. Wagner, Y. Wang, J.
Staley, Jonathan P, Guthrie, Christine
openaire   +2 more sources

A Study on the Improvement of the Durability of an Energy Harvesting Device with a Mechanical Stopper and a Performance Evaluation for Its Application in Trains

open access: yesMicromachines, 2020
Durability is one of the critical issues concerning energy harvesting devices. Even with the energy harvesting device’s excellent performance design, the moving components, such as the spring, get damaged during operation.
Jaehoon Kim
doaj   +1 more source

Magnetic Spring Device

open access: yes, 2009
A cylindrical system is proposed that will store magnetic energy in a localized azimuthal field that can then be quickly released on Alfvenic timescales, accompanied by the formation of a flowing Z-pinch plasma. The magnetized plasma is MHD in character and will have unilateral axial momentum with Alfvenic speeds.
Hassam, A. B., Rodgers, J. C.
openaire   +2 more sources

Determining Efficacy of a Passive Exoskeleton for Running [PDF]

open access: yes, 2020
A Valparaiso University engineering senior design team is developing a lower-body exoskeleton prototype to increase the user’s running efficiency by 2%.
Rhodes, Peter
core   +1 more source

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