Results 101 to 110 of about 5,063 (265)

Efficient Harvesting of Irregular and Low‐Frequency Mechanical Energy via Hybridized Electromagnetic‐Triboelectric Systems

Small, EarlyView.
ABSTRACT The rapid expansion of the Internet of Things (IoT) and wearable electronics necessitates sustainable power sources to replace the limited electrochemical battery. While mechanical energy harvesting offers a promising solution, traditional harvesters face challenges of irregular and low−frequency environmental sources. This review presents the
Yongbin Han, Ju‐Hyuck Lee, Hong‐Joon Yoon   +2 more
wiley   +1 more source

Flapping mechanism design and aerodynamic analysis for the flapping wing micro air vehicle

, 2011
This paper introduces a biological flapping micro air vehicle (FMAV) with four wings, instead of two wings, where wing clap-and-fling of real insects has been mimicked. The total weight is 2.236g.
Meng K(孟坤), Qin, Yi, Cui F(崔峰), Wu XS(吴校生), Li HY(李洪谊), Zhang WP(张卫平), Chi PC(迟鹏程), Chen WY(陈文元), Liu W(刘武)   +8 more
core  

Lift from Spanwise Flow in Simple Flapping Wings

, 2008
Spanwise flow contributes to lift in thin flat-plate zero-pitch-angle flapping wings in quiescent air. It is reasonable to maintain only the, kinematics and mechanical complexity absolutely necessary in developing flapping-wing micro air vehicles.
Altman, Aaron, Hong, Young Sun
core   +1 more source

Physical Anchoring‐Assisted Mechanically Guided Assembly for Material‐Independent 3D Mesostructures

Small, EarlyView.
Conventional mechanically guided 3D assembly relies on selective chemical bonding between 2D precursors and elastomeric substrates, imposing fundamental limitations on material compatibility and scalability. Here, we present a physically anchored, buckling‐guided assembly platform based on a rod array patterned elastomeric substrate (RPES).
Yeonhee Heo, Pei Liu, Jeongmin Yoo, Jae Hyuk Hwang, Gooyoon Chung, Dong‐Gyun Kim, Raudel Avila, Yoonseok Park   +7 more
wiley   +1 more source

Dynamic response of a piezoelectric flapping wing

, 2015
Piezo-composite membranes have advantages over motorized flapping where frequencies are high and certain coupling between bending and twisting is useful to generate lift and forward flight. We draw examples of fruit fly and bumble bee.
Dutta, Soma, Kumar, A, Venkatesh, S, Khandwekar, G, Roy Mahapatra, D   +4 more
core   +1 more source

Aerodynamic Evaluation of Flapping Wings with Leading-Edge Twisting. [PDF]

Biomimetics (Basel), 2023
Yang LJ, Joseph VJ, Lo YL, Tang WT, Esakki B, Kompala S, Veeranjaneyulu P.   +6 more
europepmc   +1 more source

Saving Bambi from the mower? Using a drone with thermal camera to evaluate a low‐tech scaring technique to reduce roe deer fawn mortality during grass harvest

Wildlife Biology, EarlyView.
Roe deer is a species that hides their neonates as an anti‐predator strategy. This may prove efficient against mammalian predators, such as the red fox; however, it might be an ecological trap as large numbers of fawns are killed by tractors with harvesters each year during grass harvest.
Thomas Vogler, Neri H Thorsen, Simen Pedersen   +2 more
wiley   +1 more source

Study of design parameters of flapping-wings

, 2014
As one of the most important components of a flapping-wing micro air vehicle (FWMAV), the design of an energy-efficient flapping-wing has been a research interest recently.
Wang, Q., Goosen, J.F.L. (author), Goosen, J.F.L., Van Keulen, F. (author), Wang, Q. (author), Van Keulen, F.   +5 more
core   +1 more source

Development of a Novel Tailless X-Type Flapping-Wing Micro Air Vehicle with Independent Electric Drive

Biomimetics
A novel tailless X-type flapping-wing micro air vehicle with two pairs of independent drive wings is designed and fabricated in this paper. Due to the complexity and unsteady of the flapping wing mechanism, the geometric and kinematic parameters of ...
Yixin Zhang, Song Zeng, Shenghua Zhu, Shaoping Wang, Xingjian Wang, Yinan Miao, Le Jia, Xinyu Yang, Mengqi Yang   +8 more
doaj   +1 more source

The Greatest Show (Birds) on Earth: Public Presentations and Their Welfare Impacts on Zoo‐Housed Birds

Zoo Biology, EarlyView.
Birds involved in bird shows were compared against non‐show birds regarding show paticipation, behaviour, body score condiiton, and feather condition. Additionally, comparisons between on and off show days as well as before and after the show were made to investigate differences in behaviour and condition. Show birds demonstrated a closer to ideal body
Bridget Cooper‐Rogers, Paige Klingner, Sara Hanson, Justine Partoon, Eduardo J. Fernandez   +4 more
wiley   +1 more source