Results 11 to 20 of about 26,075,004 (255)

A novel scheme for ultrashort terahertz pulse generation over a gapless wide spectral range: Raman-resonance-enhanced four-wave mixing

open access: yesLight: Science & Applications, 2023
Energetic ultrashort THz pulses tunable over a wide gapless spectral region can be generated by Raman-resonance-enhanced four-wave mixing in diamond.
Jiaming Le   +4 more
doaj   +1 more source

MEIS investigations of surface structure [PDF]

open access: yes, 2006
The early work of the FOM-AMOLF group in Amsterdam clearly demonstrated the potential of medium energy ion scattering (MEIS), typically using 100 keV H+ incident ions, to investigate the structure of surfaces, but most current applications of the method ...
Bailey   +26 more
core   +1 more source

Contribution of friction and adhesion to the reliable attachment of a gecko to smooth inclines

open access: yesFriction, 2017
Geckos’ ability to move on steep surfaces depends on their excellent adhesive structure, timely adjustments on locomotor behaviors, and elaborates control on reaction forces.
Zhouyi Wang   +4 more
doaj   +1 more source

The Roles and Comparison of Rigid and Soft Tails in Gecko-Inspired Climbing Robots: A Mini-Review

open access: yesFrontiers in Bioengineering and Biotechnology, 2022
Geckos use millions of dry bristles on their toes to adhere to and rapidly run up walls and across ceilings. This has inspired the successful development of dry adhesive materials and their application to climbing robots.
Guangyuan Zang   +3 more
doaj   +1 more source

On the surface structure of sunspots [PDF]

open access: yes, 2012
A precise knowledge of the surface structure of sunspots is essential to construct adequate input models for helioseismic inversion tools. We summarize our recent findings about the velocity and magnetic field in and around sunspots using HINODE ...
Franz, Morten
core   +1 more source

Experimental Investigation on the Thermal Performance of a Sintered Flexible Woven Heat Sink

open access: yesIEEE Access, 2019
A novel flexible woven heat sink (FWHS) composed of sintered copper braided belts was proposed here to meet the heat dissipation requirements of the flexible radiator installed in a narrow space.
Yong Tang   +6 more
doaj   +1 more source

The square rod-shaped ionic polymer-metal composite and its application in interventional surgical guide device

open access: yesInternational Journal of Smart and Nano Materials, 2020
Ionic polymer-metal composite (IPMC) is an electro-active polymer material, which has many advantages such as small size, light weight, low driving voltage, large strain, and good biocompatibility. However, the conventional sheet IPMC has the shortcoming
Qingsong He   +5 more
doaj   +1 more source

Crumpled surface structures

open access: yesSoft Matter, 2008
We present a scalable patterning method based on surface plate buckling, or crumpling, to generate a variety of topographies that can dynamically change shape and aspect ratio in response to stimuli.
Holmes, Douglas P.   +2 more
openaire   +3 more sources

Mini Review: Comparison of Bio-Inspired Adhesive Feet of Climbing Robots on Smooth Vertical Surfaces

open access: yesFrontiers in Bioengineering and Biotechnology, 2021
Developing climbing robots for smooth vertical surfaces (e.g., glass) is one of the most challenging problems in robotics. Here, the adequate functioning of an adhesive foot is an essential factor for successful locomotion performance.
Pongsiri Borijindakul    +5 more
doaj   +1 more source

Improvement in Luminous Efficacy and Thermal Performance Using Quantum Dots Spherical Shell for White Light Emitting Diodes

open access: yesNanomaterials, 2018
White light-emitting diodes (WLEDs) based on quantum dots (QDs) are gaining increasing attention due to their excellent color quality. QDs films with planar structure are universally applied in WLEDs for color conversion, while they still face great ...
Songmao Chen   +6 more
doaj   +1 more source

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