Results 111 to 120 of about 90,917 (298)

Analysis of the effect of hydraulic steering wheel system on decrease in the vibration transmitted to driver’s hand-arm [PDF]

open access: yesطب کار, 2014
Background: Vibration of body especially that of hand-arm is a key factor in developing inconvenience in drivers, which decreases efficiency, triggers fatigue and disturbance in physiological activities, and finally predisposes drivers to occupational ...
Hasssan Rajabi   +4 more
doaj  

Unlocking Multi‐Valley Energy Pockets and Interface‐Induced Phonon Filtering in InSb Thermoelectrics by Reaction‐Driven Interface Engineering

open access: yesAdvanced Functional Materials, EarlyView.
InSb, a narrow‐bandgap semiconductor with high carrier mobility, is promising for thermoelectric energy conversion but suffers from high lattice thermal conductivity and strong bipolar conduction. Here, in situ interface engineering using Co2O3 nanoprecursors forms hierarchical CoSbx/In2O3/CoSb3 heterostructures that enhance phonon scattering and ...
Jiwu Xin   +10 more
wiley   +1 more source

Vibration analyzer [PDF]

open access: yes, 1990
The invention relates to monitoring circuitry for the real time detection of vibrations of a predetermined frequency and which are greater than a predetermined magnitude. The circuitry produces an instability signal in response to such detection.
Bozeman, Richard J., Jr.
core   +1 more source

Design Strategies and Emerging Applications of High‐Performance Flexible Piezoresistive Pressure Sensors

open access: yesAdvanced Functional Materials, EarlyView.
Flexible piezoresistive pressure sensors underpin wearable and soft electronics. This review links sensing physics, including contact resistance modulation, quantum tunneling and percolation, to unified materials/structure design. We highlight composite and graded architectures, interfacial/porous engineering, and microstructured 3D conductive networks
Feng Luo   +2 more
wiley   +1 more source

Fluid Forces Control Structural Remodeling of Blind‐Ended Lymphatic Microvessels

open access: yesAdvanced Healthcare Materials, EarlyView.
Using innovative microfluidic biofabrication with fluid mechanical insights, we recapitulated the blind‐ended microanatomy and physiological drainage properties of capillary lymphatics. Our results reveal the interrelationship between intra‐ and extraluminal regions of lymphatic vessels due to flow‐induced sprouting and morphological changes that ...
Jacob C. Holter   +5 more
wiley   +1 more source

4D Scanning Transmission Ultrafast Electron Microscopy: Single-Particle Imaging and Spectroscopy [PDF]

open access: yes, 2011
We report the development of 4D scanning transmission ultrafast electron microscopy (ST-UEM). The method was demonstrated in the imaging of silver nanowires and gold nanoparticles.
Ortalan, Volkan, Zewail, Ahmed H.
core  

Laser‐Assisted Processing and Modification of Bioactive Glasses: A Review

open access: yesAdvanced Healthcare Materials, EarlyView.
Laser technologies provide powerful tools to process and transform bioactive glasses for advanced biomedical applications. This review discusses laser‐matter interaction mechanisms, laser surface engineering, and laser‐assisted fabrication of scaffolds and nanofibers.
Antonio Riveiro   +8 more
wiley   +1 more source

A Measurement System to Characterize the Effects of Tires on Bicycle Vibrations

open access: yesEng
In recent years, the evolution of competitive road cycling has included the use of larger tires inflated at lower pressure compared to the thin, high-pressure tires used previously. This trend is also emerging in non-competitive cycling, where comfort is
Francesco Crenna   +4 more
doaj   +1 more source

Foundations of hand-transmitted vibration standards.

open access: yesNagoya journal of medical science, 1995
Standards for hand-transmitted vibration predict dependent variables (e.g. finger blanching) from measurements of a few independent variables (e.g. vibration magnitude, vibration frequency, exposure duration). This paper illustrates the assumptions in the current International Standard guidelines for the evaluation of hand-transmitted vibration and ...
openaire   +1 more source

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