Results 81 to 90 of about 78,377 (265)

The role of vortices in animal locomotion in fluids

Applied and Computational Mechanics, 2014
The aim of this paper is to show the significance of vortices in animal locomotion in fluids on two deliberately chosen examples. The first example concerns lift generation by bird and insect wings, the second example briefly mentiones swimming and ...
Dvořák R.
doaj  

Behaviour of dairy cows subjected to an aversive veterinary procedure. [PDF]

Biotemas, 2009
On small dairy farms that lack appropriate handling facilities, cows can be restrained and subjected to veterinary inspection or treatment in their milking environment, which in turn might influence the behaviour of the animals, disrupting routine ...
Maria José Hötzel, Carla Christina de Miranda Gomes, Luiz Carlos Pinheiro Machado Filho   +2 more
doaj  

The extent of the preserved feathers on the four-winged dinosaur Microraptor gui under ultraviolet light.

PLoS ONE, 2010
BackgroundThe holotype of the theropod non-avian dinosaur Microraptor gui from the Early Cretaceous of China shows extensive preservation of feathers in a halo around the body and with flight feathers associated with both the fore and hindlimbs.
David W E Hone, Helmut Tischlinger, Xing Xu, Fucheng Zhang   +3 more
doaj   +1 more source

The Optimum Flight Speeds of Flying Animals

Journal of Avian Biology, 1998
Conventional models of bird flight combine metabolic, mechanical, and aerodynamic components to calculate the rate of fuel consumption and power required for flight, from which we may derive the optimal speeds flying animals should use in different situations.
Adrian L. R. Thomas, Anders Hedenstrom
openaire   +1 more source

Fullerene‐Mediated Iodine Immobilization at Buried Interfaces in Sn–Pb Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
Indene‐C60 bisadduct (ICBA) accumulates at the buried interface of inverted tin‐lead perovskite solar cells, limiting undesired electron extraction while maintaining efficient hole transport. ICBA simultaneously scavenges molecular iodine, mitigating Sn2+ oxidation and interfacial recombination. This coupled electronic‐chemical regulation delivers 22.7%
Chi‐Jing Huang, Yi‐Sheng Lin, Matyas Daboczi, Yueyao Dong, Anuj Kumar Singh, Luis Lanzetta, Yun‐Shan Li, Chang‐Hao Wang, Huan‐Wei Lin, Wei‐Jia Qiu, Yi‐Ting He, Chun‐Fu Chang, Sanjayan Sathasivam, Derya Baran, Thomas J. Macdonald, Chieh‐Ting Lin   +15 more
wiley   +1 more source

Flight muscle mitochondria are robust against endurance flight damage in blackpoll warblers Setophaga striata

Journal of Avian Biology
Migratory birds are physiologically challenged by intense exercise while fasting during flights that may last hours to days. Exercise‐induced oxidative stress could compromise flight performance by inducing mitochondrial dysfunction in the flight muscle.
Soren Z. Coulson, Catherine M. Ivy, James F. Staples, Christopher G. Guglielmo   +3 more
doaj   +1 more source

Miniaturized multi-sensor loggers provide new insight into year-round flight behaviour of small trans-Sahara avian migrants

Movement Ecology, 2018
Background Over the past decade, the miniaturisation of animal borne tags such as geolocators and GPS-transmitters has revolutionized our knowledge of the whereabouts of migratory species.
Felix Liechti, Silke Bauer, Kiran L. Dhanjal-Adams, Tamara Emmenegger, Pavel Zehtindjiev, Steffen Hahn   +5 more
doaj   +1 more source

Engineering Local Polar Frustration in Lead‐Free Dielectric Ceramics for Ultrahigh Normalized Energy Storage Performance

Advanced Functional Materials, EarlyView.
Local polar frustration is engineered to stabilize an ergodic relaxer through nanoscale multiphase coexistence, suppressing long‐range ferroelectric order while preserving high polarization. This strategy delivers ultrahigh low‐field normalized energy density (Wa >0.020 mC cm−2), exceptional thermal stability, and a transferable design principle for ...
Hareem Zubairi, Muhammad Wasim, Songhao Fu, Xiaojiao Liu, Annette K Kleppe, Zhilun Lu, Antonio Feteira, Diming Xu, Joseph C.A. Prentice, Ge Wang   +9 more
wiley   +1 more source

Microfluidic Nano‐Assembly of Red‐Blood‐Cell (RBC) Lipids and Components for Engineering Extracellular Vesicles

Advanced Healthcare Materials, EarlyView.
Engineered red blood cell‐derived extracellular vesicles (eRBCEVs) are synthesized via controlled microfluidic assembly from native RBC lipids, enabling tunable encapsulation of proteins, nucleic acids, nanoparticles, and viral vectors. The platform demonstrates reproducible nanoscale architecture, preserved membrane composition, and functional cargo ...
Chiranth K. Nagaraj, Xilal Y. Rima, Kim T. Nguyen, Courtney Culkins, Nana Boateng, Jacob Doon‐Ralls, Alejandro Bresolin, Xin Huang, Hong Li, Vahedi Amid, Ajeet Pal Singh, Dharti Shantaram, Anastasiia Amari, Mangesh D. Hade, Nicholas R. Merriam, Zachary D. Schultz, Scott Q. Harper, Nizar Y. Saad, Setty M. Magaña, Willa A. Hsueh, Rachel E. Kopec, Blaise R. Kimmel, Andre F. Palmer, Eduardo Reátegui   +23 more
wiley   +1 more source

Drone noise differs by flight maneuver and model: implications for animal surveys

Drone Systems and Applications
Drones are becoming a common tool for animal monitoring; however, sound emitted from drones may disturb animals and bias survey results. Understanding noise levels produced by different flight maneuvers, altitudes (i.e., above ground level (AGL)), and ...
Erin N. Macke, Landon R. Jones, Raymond B. Iglay, Jared A. Elmore   +3 more
doaj   +1 more source