Results 51 to 60 of about 2,006,275 (401)

Bird flocks [PDF]

open access: yesCurrent Biology, 2020
Steven Portugal introduces the behavioral and aerodynamic underpinnings of aerial flocking in birds.
openaire   +2 more sources

Synchronized Electro‐Chromo‐Emissive Devices Using a Mixed Ionic‐Electronic Conductive Layer for XR Applications

open access: yesAdvanced Functional Materials, EarlyView.
A single cell type Electro‐chromo‐emissive (ECECL) device integrating synchronized electrochromic (EC) and electrochemiluminescent (ECL) functions is developed using a mixed ionic‐electronic conductor (MIEC). A MIEC layer reduces ionic/electronic resistance, enabling ultrafast switching and enhanced optical contrast.
Hwandong Jang   +5 more
wiley   +1 more source

Declines of Aerial Insectivores in North America Follow a Geographic Gradient

open access: yesAvian Conservation and Ecology, 2010
North American birds that feed on aerial insects are experiencing widespread population declines. An analysis of the North American Breeding Bird Survey trend estimates for 1966 to 2006 suggests that declines in this guild are significantly stronger than
Silke Nebel   +3 more
doaj   +1 more source

Multimodal Structural Color Graphics Based on Colloidal Photonic Microdome Arrays

open access: yesAdvanced Functional Materials, EarlyView.
A hybrid photonic system combining colloidal crystals and microscale domes is designed to achieve four switchable optical states via the interplay of Bragg reflection and TIR interference. The graphics composed of the photonic microdome arrays provide tunable, angle‐sensitive structural coloration and concealed‐to‐revealed transitions, offering a ...
Jun‐Gu Kang   +4 more
wiley   +1 more source

The FireBird Mission – A Scientific Mission for Earth Observation and Hot SpotDetection [PDF]

open access: yes, 2013
More than 10 years ago the first specialized small satellite for hot spot recognition and fire observation was designed, built and operated by several DLR departments.
Lorenz, Eckehard   +2 more
core  

Biobased Bionic Spider Silk via Electrostatic Complexation for Simultaneously Harvesting Atmospheric Water and Triboelectric Energy

open access: yesAdvanced Functional Materials, EarlyView.
Bio‐based bionic spider silk and spider web are first prepared using polyelectrolyte complexation technique for the simultaneous harvesting of water and triboelectric energy. The advantage of this process lies on entirely bio‐based materials, fully green water‐processable procedures, extremely high production rate (99.36%), excellent fog harvesting ...
Qin Chen   +9 more
wiley   +1 more source

Bird Population Changes Following the Establishment of a Diverse Stand of Woody Plants in a Former Crop Field in North Dakota, 1975– 2015 [PDF]

open access: yes, 2018
Changes in the coverage of trees and shrubs on the North Dakota landscape since Euro- American settlement have likely had a pronounced impact on bird species that favor woody vegetation.
Igl, Lawrence D.   +2 more
core   +1 more source

Photoconductivity‐Driven Quantum Efficiency Gain in Inorganic Ruddlesden‐Popper Layered Cs2PbBr2I2 Perovskite Photodetector for Visible Light Detection

open access: yesAdvanced Functional Materials, EarlyView.
Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah   +11 more
wiley   +1 more source

Do Striped Hyenas Have a Sweet Tooth? First Evidence of Honey Consumption by a Hyaenid

open access: yesEcology and Evolution
Dietary flexibility in carnivores remains an underexplored aspect of their ecology, particularly the consumption of non‐meat foods. While striped hyenas (Hyaena hyaena) are primarily scavengers, they are known to occasionally consume plant material ...
Francisca A. S. Virtuoso   +22 more
doaj   +1 more source

VERITAS observations of the Cygnus Region

open access: yes, 2017
The Cygnus region of the galaxy is one of the richest regions of gas and star formation and is the brightest region of diffuse GeV emission in the northern sky.
Bird, Ralph
core   +1 more source

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