Results 91 to 100 of about 4,821 (295)

Investigation of Helicopter Blade Tip Configuration during Hover Flight Employing Computational Fluid Dynamics

open access: yesModelling and Simulation in Engineering
Our research focused on investigating the influence of rotor blade tip geometry on the aerodynamic performance of helicopters during hover flight, with the goal of enhancing overall efficiency.
Soufiane Stouti   +4 more
doaj   +1 more source

Forms, technical culture and architectural expression

open access: yesEGA, 2016
The development of reinforced concrete techniques and the appearance of a hitherto unknown typology, shells, propitiated a surprising transformation of the modern canon, whose critical assessment needs to be updated from new interpretive hypotheses.
Cármen Jordá Such
doaj   +1 more source

Broadband Directional Thermal Radiation with Asymmetric Femtosecond Laser‐Processed Surfaces

open access: yesAdvanced Optical Materials, EarlyView.
Femtosecond laser processing is used to scalably create self‐organized angled microstructures which exhibit highly directional emissivity that occurs for all polarizations. Laser parameters are tuned to alter the surface features, control the direction of emission, and enhance the directional emissivity. Electromagnetic modeling is performed to analyze
Andrew Butler   +8 more
wiley   +1 more source

General construction of symmetric parabolic structures

open access: yes, 2012
First we introduce a generalization of symmetric spaces to parabolic geometries. We provide construction of such parabolic geometries starting with classical symmetric spaces and we show that all regular parabolic geometries with smooth systems of ...
Jan Gregorovič, Gregorovič, Jan
core   +1 more source

Grip and Grasp: Lizard Claw Inspired Robotic Manipulators

open access: yesAdvanced Robotics Research, EarlyView.
Our study identifies the most effective lizard claw shape for use as an end effector in a bioinspired robotic manipulator. By examining key geometric features and combining them into comparative indices, the Crotaphytus collaris claw is found to be the best fit.
Hyeon Lee   +4 more
wiley   +1 more source

Laboratory Validation of 3D Model and Investigating Its Application to Wind Turbine Noise Propagation over Rough Ground

open access: yesWind
In an investigation into how wind turbine noise interacts with the surrounding terrain, its propagation over rough ground is simulated using a parabolic equation code using a modified effective impedance model, which characterizes the effects of a three ...
James Naylor, Qin Qin
doaj   +1 more source

Closed ray nil-affine manifolds and parabolic geometries

open access: yes, 2021
Ray nil-affine geometries are defined on nilpotent spaces. They occur in every parabolic geometry and in those cases, the nilpotent space is an open dense subset of the corresponding flag manifold.
Alexandre, Raphaël, V   +1 more
core  

Microscale Mapping of Fiber Strain and Damage in Composite Wrinkled Laminates Using Computed Tomography Assisted Wide‐Angle X‐Ray Scattering

open access: yesAdvanced Science, EarlyView.
This study combines full‐field tomography with diffraction mapping to quantify radial (ε002$\varepsilon _{002}$) and axial (ε100$\varepsilon _{100}$) lattice strain in wrinkled carbon‐fiber specimens for the first time. Radial microstrain gradients (−14.5 µεMPa$\varepsilon \mathrm{MPa}$−1) are found to signal damage‐prone zones ahead of failure, which ...
Hoang Minh Luong   +7 more
wiley   +1 more source

Numerical analysis of entropy optimization and viscous nanofluid over a nonlinear parabolic stretching surface

open access: yesInternational Journal of Thermofluids
The exploration of heat transmission in nanofluid flow over curved geometries is dynamic for improving the significance of advanced thermal systems used in manufacturing, energy, and biomedical applications.
T. Salahuddin   +3 more
doaj   +1 more source

Courant Algebroids in Parabolic Geometry

open access: yes, 2011
24 pages. v3: Added Section 4.3.
Armstrong, Stuart, Lu, Rongmin
openaire   +2 more sources

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