Results 61 to 70 of about 8,471 (240)

Nondiffusive spin dynamics in a two-dimensional electron gas [PDF]

open access: yes, 2006
We describe measurements of spin dynamics in the two-dimensional electron gas in GaAs=GaAlAs quantum wells. Optical techniques, including transient spin-grating spectroscopy, are used to probe the relaxation rates of spin polarization waves in the wave ...
Awschalom, D. D.   +5 more
core   +3 more sources

Multifunctional Micro/Nanostructured Interfaces, Fabrication Technologies, Wetting Control, and Future Prospects

open access: yesAdvanced Materials Interfaces, Volume 12, Issue 22, November 22, 2025.
This review explores recent developments in micro/nanostructured surfaces, with a focus on cavity‐based and reentrant geometries for enhanced liquid repellency and interfacial control. The review discusses fabrication strategies, structural design principles, and application trends, providing a balanced perspective on opportunities and ongoing ...
Seo Rim Park   +11 more
wiley   +1 more source

Aerodynamic enhancement of wind turbine blades through Peregrine falcon‐inspired surface designs

open access: yesEnvironmental Progress &Sustainable Energy, Volume 44, Issue 6, November/December 2025.
Abstract As global energy demands increase, enhancing renewable energy technologies, particularly wind turbines, is essential to meet sustainability goals. However, achieving higher efficiency remains challenging due to limitations in traditional blade designs. This study explores an innovative solution by applying biomimetic principles inspired by the
Yasin Furkan Gorgulu, Mustafa Arif Ozgur
wiley   +1 more source

Light‐Fueled In‐Operando Shape Reconfiguration, Fixation, and Recovery of Magnetically Actuated Microtextured Covalent Adaptable Networks

open access: yesAdvanced Materials, Volume 37, Issue 39, October 2, 2025.
A covalent adaptable network with dynamic disulfide bonds (DS‐CAN) can rearrange its molecular topology through heating or UV irradiation. When combined with ferromagnetic particles, its photoresponsiveness at room temperature enables contactless, spatiotemporal regulation of dynamic bond exchanges during magnetomechanical actuation.
Yeomyung Yoon   +6 more
wiley   +1 more source

Numerical Analysis of the Effects of Riblets on Drag Reduction of a Flat Plate

open access: yesJournal of Applied Fluid Mechanics, 2018
In recent years, marine transportation as well as land and air transportation has become in the centre of attention. There has been an attempt to reduce the drag exerted on vessels by various methods, such as rough surfaces and base bleed.
A. Heidarian, H. Ghassemi, P. Liu
doaj  

Shark-inspired riblet design and optimization for drag reduction in drinking water distribution pipes across varying flow rates

open access: yesWater Research X
Drinking water distribution systems (DWDS) experience significant energy losses due to turbulence-induced drag. While shark-inspired riblet surfaces have been shown to reduce drag in controlled conditions, their effectiveness in DWDS remains uncertain ...
Mirvahid Mohammadpour Chehrghani   +4 more
doaj   +1 more source

Numerical investigation of passive control flow to improve tire hydroplaning performance using a V-riblet non-smooth surface

open access: yesAdvances in Mechanical Engineering, 2017
As one of the major causes of traffic accidents, tire hydroplaning is a key driver safety concern. A tire model 205/55R16 was employed in this study, and a virtual simulation of a deformed half-tire domain for calculating hydroplaning speed was built by ...
Haichao Zhou   +3 more
doaj   +1 more source

Fluid drag-reducing effect and mechanism of superhydrophobic [PDF]

open access: yes, 2014
This paper was presented at the 4th Micro and Nano Flows Conference (MNF2014), which was held at University College, London, UK. The conference was organised by Brunel University and supported by the Italian Union of Thermofluiddynamics, IPEM, the ...
4th Micro and Nano Flows Conference (MNF2014)   +5 more
core  

Metric for attractor overlap [PDF]

open access: yes, 2018
We present the first general metric for attractor overlap (MAO) facilitating an unsupervised comparison of flow data sets. The starting point is two or more attractors, i.e., ensembles of states representing different operating conditions.
Albers, Marian   +8 more
core   +1 more source

Role of the Setae in an Ectoparasitic Seal Louse in Reducing Surface Drag: Numerical Modeling Approach

open access: yesAdvanced Theory and Simulations, Volume 8, Issue 10, October 2025.
The seal louse Echinophthirius horridus has uniquely shaped setae that may reduce drag during its host's dives. Using numerical simulations, this study demonstrates that their natural inclination promotes vortex formation, minimizing friction and energy loss. These findings provide insights into biological surface adaptations and may inspire the design
Anika Preuss   +3 more
wiley   +1 more source

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