Results 51 to 60 of about 562,123 (288)

Influence of Habitat and Food Resource Availability on Common Raven Nest Site Selection and Reproductive Success in Mediterranean Forests

open access: yesBirds, 2021
Bird nest selection in forests can be influenced by the composition of key structural elements and resources. This has important consequences in terms of species population dynamics since it can determine reproduction success.
Amalia Segura, Pelayo Acevedo
doaj   +1 more source

Over 95% Optical Reflectance From Structurally Modulated All‐Biopolymer Multilayers

open access: yesAdvanced Materials, EarlyView.
A new dense–porous design turns ordinary polysaccharides into highly reflective photonic multilayers. Alternating dense pectin and porous cellulose nanofiber layers create strong refractive‐index contrast without inorganic or synthetic polymers, enabling nearly perfect visible reflection, high near‐infrared reflection, broadband metallic‐like colors ...
Takaaki Kasuga   +9 more
wiley   +1 more source

Boyle and Birds' Company Law

open access: yes, 2014
Boyle & Birds' Company Law is a well established leading textbook based on Gore-Browne on Companies. It combines a comprehensive and authoritative exploration of law and practice with an examination of the theoretical ...
Birds, John   +6 more
core   +2 more sources

Non-Invasive Monitoring of the Spatio-Temporal Dynamics of Vocalizations among Songbirds in a Semi Free-Flight Environment Using Robot Audition Techniques

open access: yesBirds, 2021
To understand the social interactions among songbirds, extracting the timing, position, and acoustic properties of their vocalizations is essential. We propose a framework for automatic and fine-scale extraction of spatial-spectral-temporal patterns of ...
Shinji Sumitani   +4 more
doaj   +1 more source

Avian Wing Proportions and Flight Styles: First Step towards Predicting the Flight Modes of Mesozoic Birds [PDF]

open access: yes, 2011
We investigated the relationship between wing element proportions and flight mode in a dataset of living avian species to provide a framework for making basic estimates of the range of flight styles evolved by Mesozoic birds.
Wang Xia   +13 more
core   +1 more source

4D–Printed Photothermally Actuated Soft Microgripper on an Optical Fiber Tip for Biomedical Applications

open access: yesAdvanced Materials Technologies, EarlyView.
In this study, we developed a light–driven soft microgripper by 3D–printing a photo–crosslinkable, temperature–responsive hydrogel with embedded silver particles onto an optical fiber tip. The microgripper actuates via photothermal effects at cell culture temperature and can gently grasp spheroids without minimal damage, offering a compact, actuator ...
Shogo Oishi   +7 more
wiley   +1 more source

The density and diversity of birds on farmland in West Africa [PDF]

open access: yes, 2008
The area of land farmed in Africa is predicted to double by the year 2050 yet very few African studies have investigated the impact of different farming intensities and regimes on bird communities. This study examined avian species richness and diversity
Hulme, Mark F.
core   +2 more sources

Information Transmission Strategies for Self‐Organized Robotic Aggregation

open access: yesAdvanced Robotics Research, EarlyView.
In this review, we discuss how information transmission influences the neighbor‐based self‐organized aggregation of swarm robots. We focus specifically on local interactions regarding information transfer and categorize previous studies based on the functions of the information exchanged.
Shu Leng   +5 more
wiley   +1 more source

Using DNA metabarcoding to explore spatial variation in diet across European Hawfinch populations

open access: yesJournal of Field Ornithology, 2023
The investigation of diet in avian species is essential for understanding their ecology and local adaptations, as well as long-term conservation. This can be particularly challenging because of the wide distribution and high ecological plasticity of many
Ewan H. Stenhouse   +5 more
doaj  

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