Results 11 to 20 of about 174,468 (300)

Dissection of Larval and Pupal Wings of Bicyclus anynana Butterflies

open access: yesMethods and Protocols, 2020
The colorful wings of butterflies are emerging as model systems for evolutionary and developmental studies. Some of these studies focus on localizing gene transcripts and proteins in wings at the larval and pupal stages using techniques such as ...
Tirtha Das Banerjee, Antónia Monteiro
doaj   +1 more source

Animalopters - towards a new dimension of flight mechanics [PDF]

open access: yesTransport, 2002
Recently, it has been recognised that flapping wing propulsion can be more efficient than conventional propel­lers if applied to very small-scale vehicles, so-called MAVs (micro air vehicles).
J. A. Goszczynski   +3 more
doaj   +3 more sources

Separasi Aliran pada Permukaan Atas Airfoil Kumbang Kelapa dengan Metoda China Clay

open access: yesMetal: Jurnal Sistem Mekanik dan Termal, 2020
This study is aimed at identifying airfoils by mimicking the curved shape of the wings of a flying animal. This interferes with what people did in ancient times to obtain objects capable of flying.
Benny Dwika Leonanda
doaj   +1 more source

Ways that Animal Wings Produce Sound

open access: yesIntegrative and Comparative Biology, 2021
SynopsisThere are at least eight ways that wings potentially produce sound. Five mechanisms are aerodynamic sounds, created by airflow, and three are structural sound created by interactions of solid surfaces. Animal flight is low Mach (M), meaning all animals move at <30% of the speed of sound.
openaire   +2 more sources

A linear systems analysis of the yaw dynamics of a dynamically scaled insect model [PDF]

open access: yes, 2010
Recent studies suggest that fruit flies use subtle changes to their wing motion to actively generate forces during aerial maneuvers. In addition, it has been estimated that the passive rotational damping caused by the flapping wings of an insect is ...
Dickinson, Michael H.   +3 more
core   +1 more source

Take-off mechanics in hummingbirds (Trochilidae) [PDF]

open access: yes, 2004
Initiating flight is challenging, and considerable effort has focused on understanding the energetics and aerodynamics of take-off for both machines and animals.
Altshuler, Douglas L.   +2 more
core   +2 more sources

Animal migration research takes wing [PDF]

open access: yesCurrent Biology, 2018
In the beginning there was great confusion about animal migration. Aristotle, noting that the types of birds around him changed with the seasons, concluded that summer redstarts turned into robins at the onset of winter, and that garden warblers became blackcaps [1]. Others thought that birds disappear in winter because they hibernate submerged in mud.
openaire   +2 more sources

Theoretical modelling of wakes from retractable flapping wings in forward flight [PDF]

open access: yesPeerJ, 2013
A free-wake method is used to simulate the wake from retractable, jointed wings. The method serves to complement existing experimental studies that visualise flying animal wakes.
Ben Parslew, William J. Crowther
doaj   +2 more sources

Wing and body motion during flight initiation in Drosophila revealed by automated visual tracking [PDF]

open access: yes, 2009
The fruit fly Drosophila melanogaster is a widely used model organism in studies of genetics, developmental biology and biomechanics. One limitation for exploiting Drosophila as a model system for behavioral neurobiology is that measuring body kinematics
Burdick, Joel W.   +3 more
core   +1 more source

PERFORMANCE OF THREE BROILER HYBRIDS FEEDING DIETARY WITH ANIMAL OR VEGETABLE PROTEIN RESOURCE : [PDF]

open access: yesMesopotamia Journal of Agriculture, 2012
This study was conducted to determine the effect of hybrid type, source of diet protein , sex of bird and their interaction on carcass cuts and some characteristics of blood , Three hybrids bred from broiler (Cobb 500, Ross 308 and Hubbard Classic) by ...
Hazim AL-kassab
doaj   +1 more source

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