Results 41 to 50 of about 528 (167)

Can you really change your stripes? Stable wing ornamentation suggests limited condition‐dependent signalling in female common eiders

Ibis, EarlyView.
Variation in the expression of white ornaments, such as flank spots or wing stripes, has previously been related to indices of individual quality in birds. We measured the white wing stripes of colour‐banded female common eiders Somateria mollissima in three islands in Iceland from 2014 to 2023, to determine whether the expression of these ornaments is
Jón Einar Jónsson, Elisabeth Knudsen, James A. Fletcher, Ellen Magnúsdóttir, Árni Ásgeirsson, Jamie N. Carroll   +5 more
wiley   +1 more source

Bionic Tactile Skins for Robotics: Fundamentals, Advances, and Future Prospects

SmartSys, Volume 2, Issue 3, September 2026.
ABSTRACT Robotic bionic tactile skins (RBTSs), as crucial components of next‐generation robotic systems, have attracted significant attention in recent years. By enabling robots to achieve human‐like tactile perception and interact effectively with their surroundings, RBTSs play an essential role in enhancing robotic intelligence.
Jiajun Wu, Zitong Zhang, Xuhui Zhou, Yu Meng, Jie Ni, Junshan Liu, Faheng Zang, Xiaojun Guo, Zhuoqing Yang   +8 more
wiley   +1 more source

Experimental Study of the Aerodynamic Interaction between the Forewing and Hindwing of a Beetle-Type Ornithopter

Aerospace, 2018
Beetles have attracted attention from researchers due to their unique combination of a passively flapping forewing and an actively flapping hindwing during flight.
Hidetoshi Takahashi, Kosuke Abe, Tomoyuki Takahata, Isao Shimoyama   +3 more
doaj   +1 more source

Piezoelectric Energy Harvesting for Flapping Wing Micro Air Vehicle and Flapping Wing Sensing Based on Flexible Polyvinylidene Fluoride

Applied Sciences, 2021
The flapping wing micro air vehicle (FWMAV) has been attracting lots of interest since the 1990s and is one of the research hotspots in microminiaturization design.
Qiang Liu, Qiang Li, Zhifei Fang, Xiaoqin Zhou, Rongqi Wang, Chengming Zuo   +5 more
doaj   +1 more source

Assessing and Quantifying Variability Across Vacuum‐Assisted Resin Infusion Variants for Aerospace‐Grade Composite Manufacturing

Polymer Composites, Volume 47, Issue 15, Page 13664-13684, 10 August 2026.
Radar‐plot comparison of consolidation quality and flexural performance of composite laminates manufactured by six vacuum‐infusion routes, evaluated at the resin‐inlet and vacuum‐port regions. ABSTRACT Conventional vacuum‐assisted resin transfer molding (C‐VARTM) is recognized as a cost‐effective resin infusion technique for manufacturing large‐scale ...
Ilhan Kahraman, Nilperi Uysal, Çağlar Subaşı, Selin Dursun, Muhammet İskender, Özgü Çalın, Uğur Şimşir, Hatice S. Sas, A. Tuğrul Seyhan   +8 more
wiley   +1 more source

Design of a High-Performance Biomimetic Butterfly Flyer

Machines
To achieve miniaturization and lightweight design of a flapping-wing aircraft, a high-performance biomimetic butterfly flyer was designed based on an analysis of the butterfly’s body structure and flight principles.
Zhihan Li, Gaolei Qiu, Daqian Zhang, Hongshuang Li   +3 more
doaj   +1 more source

Departing With the Wind: Spring Migration Timing in Brent Geese From Their Most Important Staging and Wintering Site, the Wadden Sea World Heritage Site

Ecology and Evolution, Volume 16, Issue 8, August 2026.
The timing of migratory departure reflects a balance between endogenous schedules and transient environmental opportunities. By linking GPS‐derived departure events with hourly atmospheric data, we demonstrate that wind assistance strongly increases departure probability in Brent Geese, while this selectivity weakens over time as migratory urgency ...
Nora Theurich, Stefan Garthe, Frédéric Jiguet, Pierrick Bocher, Philipp Schwemmer   +4 more
wiley   +1 more source

A Study of structural design of flapping rotary wing aircraft

IOP Conference Series: Materials Science and Engineering, 2018
As a new layout of micro air vehicle (MAV), the flapping rotary wing (FRW) has attracted lots of attentions in recent years. In this study, the structural design of FRW aircraft, consisting of driving device, transmission part, flapping rotary mechanism and wings, is investigated.
Fan Yang, Qiang Pan, Tian He, Jianghao Wu, Yanlei Gao   +4 more
openaire   +1 more source

Simulation Analysis of the Aerodynamic Performance of a Bionic Aircraft with Foldable Beetle Wings in Gliding Flight

Applied Bionics and Biomechanics, 2020
Beetles have excellent flight performance. Based on the four-plate mechanism theory, a novel bionic flapping aircraft with foldable beetle wings was designed.
Caidong Wang, Yu Ning, Xinjie Wang, Junqiu Zhang, Liangwen Wang   +4 more
doaj   +1 more source

Calculation and Selection of Airfoil for Flapping-Wing Aircraft Based on Integral Boundary Layer Equations

Aerospace, 2023
The flight of a migratory bird-like flapping-wing aircraft is characterized by a low Reynolds number and unsteadiness. The selection of airfoil profiles is critical to designing an efficient flapping-wing aircraft.
Ming Qi, Wenguo Zhu, Shu Li
doaj   +1 more source