Results 111 to 120 of about 450,371 (196)

Note: Henry E. Wing to Ida M. Tarbell, November 24, 1924 [PDF]

open access: yes, 1924
Handwritten note signed H.E. Wing dated November 24, 1924 and Letter to Ida M. Tarbell signed Mrs.
Wing, Henry E.
core  

Adaptive Structured Proximal Policy Optimization-Based Compensation for PID Control of Folding-Wing UAVs Under Disturbances

open access: yesIEEE Access
Conventional PID control exhibits limited robustness when applied to folding-wing unmanned aerial vehicles (UAVs) operating under realistic flight conditions, where strong nonlinearities, model uncertainties, and external disturbances are present.
Ying Liu   +5 more
doaj   +1 more source

Field‐Driven Proton Transport in Water Revealed by Machine Learning Molecular Dynamics

open access: yesAdvanced Science, EarlyView.
Using a reactive and polarizable machine‐learning molecular dynamics (MLMD) framework, the authors show that excess‐proton drift remains nearly linear with applied electric field up to 0.15 V/Å. It is also found that the protonic defect mitigates the field‐induced structural changes observed in neat water, revealing a distinct high‐field response of ...
Alicia van Hees   +3 more
wiley   +1 more source

Wing Shot Hunting Club records

open access: yes, 1935
This collection contains materials and records from the Wing Shot Hunting ...
Wing Shot Hunting Club (Lonoke and Prarie County, Ark.)
core   +1 more source

Accelerating High‐Fidelity Airfoil Design via Physics‐Informed Video Diffusion Model

open access: yesAdvanced Science, EarlyView.
Physics‐informed video diffusion enables rapid inverse aerodynamic design by mapping target lift‐to‐drag response to airfoil geometries and full‐field flow distributions. Trained on 53 400 DNS samples, the model achieves over 90% fidelity with ∼30 s inference, while experimentally realized propeller designs demonstrate a practical pathway from ...
Yifeng Ai   +9 more
wiley   +1 more source

Optimization design and kinematic analysis of transient folding-deploying wings for flapping-wing aircraft

open access: yesJixie chuandong
ObjectiveExisting folding-deploying wings for flapping-wing aircraft are limited by slow deployment, low folding-deploying ratios, and insufficient optimization of flight performance.
XIONG Chenyu, HOU Yu, GAO Haotian
doaj  

Local weakening of cell-extracellular matrix adhesion triggers basal epithelial tissue folding

open access: yesThe EMBO Journal
During development, epithelial sheets sculpt organs by folding, either apically or basally, into complex 3D structures. Given the presence of actomyosin networks and cell adhesion sites on both sides of cells, a common machinery mediating apical and ...
Andrea Valencia-Expósito   +4 more
doaj   +1 more source

Advances in Folding-Wing Flying Underwater Drone (FUD) Technology

open access: yesDrones
The evolution of modern warfare and civil exploration requires platforms that can operate seamlessly across the air–water interface. The folding-wing Hybrid Air and Underwater Vehicle (FUD) has emerged as a transformative solution, combining the high ...
Jianqiu Tu   +5 more
doaj   +1 more source

Advancing Energy Materials by In Situ Atomic Scale Methods

open access: yesAdvanced Energy Materials, Volume 15, Issue 11, March 18, 2025.
Progress in in situ atomic scale methods leads to an improved understanding of new and advanced energy materials, where a local understanding of complex, inhomogeneous systems or interfaces down to the atomic scale and quantum level is required. Topics from photovoltaics, dissipation losses, phase transitions, and chemical energy conversion are ...
Christian Jooss   +21 more
wiley   +1 more source

The Effect of Spanwise Folding on the Aerodynamic Performance of a Passively Deformed Flapping Wing

open access: yesBiomimetics
The wings of birds exhibit multi-degree-of-freedom motions during flight. Among them, the flapping folding motion and chordwise passive deformation of the wings are prominent features of large birds in flight, contributing to their exceptional flight ...
Ming Qi   +3 more
doaj   +1 more source

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