Results 61 to 70 of about 44,293 (251)
Bionic Hovering Micro-Aerial Vehicle Using Array-Spiracle Wings
Machines, 2022 Hovering ability is the basis of fixed-point monitoring and tracking of an aircraft. Herein, we propose a new hovering vehicle inspired by bird feathers, with an airfoil composed of passive opening and closing feather units.
Xiangcong Zhou +3 more
doaj +1 more source
Cambios estacionales en los ensambles de aves en un ecotono bosque-estepa del norte de Patagonia [PDF]
, 2018 Estudiamos las variaciones estacionales en una comunidad de aves que habitan el ecotono bosque-estepa del norte de Patagonia. Analizamos los cambios en la riqueza de especies, la composición de especies y la abundancia total, y a nivel de las especies ...
Cueto, Víctor +1 more
core
Harmonic hopping, and both punctuated and gradual evolution of acoustic characters in Selasphorus hummingbird tail-feathers. [PDF]
, 2014 Models of character evolution often assume a single mode of evolutionary change, such as continuous, or discrete. Here I provide an example in which a character exhibits both types of change.
Clark, Christopher James
core +2 more sources
Polymer Composites, EarlyView.Biocomposites produced with agro‐industrial waste from castor hulls and pinewood bonded with urea‐formaldehyde adhesive, intended for application as thermal insulation in buildings. ABSTRACT The production of composite particleboards with agricultural waste has been the focus of many studies that aim to address environmental problems due to waste ...
Thamirys Andrade Lopes +7 more
wiley +1 more source
Linguistica Brunensia, 2020 The article is an attempt to establish the original semantics of Proto-Slavic *bъrkъ and describe semantic drifts of its continuants in the modern Slavic languages.
Michail Nikolajevič Sajenko
doaj +1 more source
PLANTS, PEOPLE, PLANET, EarlyView.The preservation and revitalization of mycocultural heritage, developed over centuries of human‐mushroom interaction, contributes to safeguarding both natural ecosystems and the promotion of sustainable rural development, one of the biggest global challenges currently faced by humankind.
Elisette Ramírez‐Carbajal +8 more
wiley +1 more source
Frontiers in Genetics, 2020 The feather rate phenotype in chicks, including early-feathering and late-feathering phenotypes, are widely used as a sexing system in the poultry industry.
Xiayi Liu +5 more
doaj +1 more source
Quantifying the dynamic wing morphing of hovering hummingbird [PDF]
Royal Society Open Science, 2017 Animal wings are lightweight and flexible; hence, during flapping flight their shapes change. It has been known that such dynamic wing morphing reduces aerodynamic cost in insects, but the consequences in vertebrate flyers, particularly birds, are not ...
Masateru Maeda +4 more
doaj +1 more source
A New Type Bionic Foldable Wing Design for High Maneuverable Unmanned Aerial Vehicle
Applied Sciences, 2023 With the improvement of aircraft requirements in civil and military fields, aircraft are developing towards the direction of high efficiency and multi-mission.
Xitong Zhang, Gui Cheng, Gang Chen
doaj +1 more source
A Grammar for Reproducible and Painless Extract-Transform-Load Operations on Medium Data [PDF]
, 2018 Many interesting data sets available on the Internet are of a medium size---too big to fit into a personal computer's memory, but not so large that they won't fit comfortably on its hard disk.
Baumer, Benjamin S.
core +4 more sources