Results 31 to 40 of about 8,422 (237)

Design Challenges to Expand the Functionality of Drones: Deformable Rotorcraft and Nature‐Inspired Flapping Drones

Advanced Intelligent Systems, EarlyView.
This review systematically analyzes deformable drones, including extendable, foldable, and tilting configurations, along with nature‐inspired flapping rotorcraft. By classifying deformation principles and structural mechanisms, design trade‐offs, functional capabilities, and future development potential are highlighted.
Ju‐Hee Lee, Sumin Jung, Jinwoo Jang, Yeji Han, Minchae Kang, Jihun Seong, Suyeon Seo, Eunsol Park, Haesol Kwak, Min‐Woo Han   +9 more
wiley   +1 more source

Adaptation to hummingbird pollination is associated with reduced diversification in Penstemon

Evolution Letters, 2019
A striking characteristic of the Western North American flora is the repeated evolution of hummingbird pollination from insect‐pollinated ancestors. This pattern has received extensive attention as an opportunity to study repeated trait evolution as well
Carolyn A. Wessinger, Mark D. Rausher, Lena C. Hileman   +2 more
doaj   +1 more source

Using stable isotopes in hummingbird breath to estimate reliance on supplemental feeders

Ecology and Evolution, 2023
Understanding the ecological consequences of supplemental feeding to both hummingbirds and the plants they pollinate is complicated by logistical challenges associated with assessing relative dietary resource use with commonly applied observational ...
Nathan Wolf, T. Scott Smeltz, Craig Cook, Carlos Martinez del Rio   +3 more
doaj   +1 more source

Phylogenomics, ecomorphological evolution, and historical biogeography in Deuterocohnia (Bromeliaceae: Pitcairnioideae)

American Journal of Botany, EarlyView.
Abstract Premise Species of Deuterocohnia (17 spp.) show extraordinary variation in elevation (0–3900 m a.s.l.) and growth forms, and many have narrow geographic distributions in the west‐central Andes and the Peru‐Chile coast. Previous research using few plastid and nuclear loci failed to produce well‐resolved or supported phylogenies.
Bing Li, Nicole Schütz, Kurt Weising, Georg Zizka, Jacob B. Landis, Thomas J. Givnish   +5 more
wiley   +1 more source

Phylogenomics reveals the evolution of floral traits associated with pollinators and pollinator–prey conflict within the carnivorous Pinguicula subgenus Temnoceras

American Journal of Botany, EarlyView.
Abstract Premise The carnivorous plant genus Pinguicula (Lentibulariaceae) exhibits remarkable floral diversity associated with pollination, particularly in the largest subgenus Temnoceras, which spans Mexico and Central America. Despite this diversity, the relationships between species and the evolution of key floral traits remain unresolved. Here, we
Yunjia Liu, Qianshi Lin, Steven J. Fleck, Martín Mata‐Rosas, Enrique Ibarra‐Laclette, Tanya Renner   +5 more
wiley   +1 more source

miR-Blood – a small RNA atlas of human blood components

Scientific Data
miR-Blood is a high-quality, small RNA expression atlas for the major components of human peripheral blood (plasma, erythrocytes, thrombocytes, monocytes, neutrophils, eosinophils, basophils, natural killer cells, CD4+ T cells, CD8+ T cells, and B cells).
Julia Jehn, Franziska Trudzinski, Rastislav Horos, Judith Schenz, Florian Uhle, Markus A. Weigand, Maurice Frank, Mustafa Kahraman, Marco Heuvelman, Tobias Sikosek, Timothy Rajakumar, Jennifer Gerwing, Jasmin Skottke, Alberto Daniel-Moreno, Christina Rudolf, Franziska Hinkfoth, Kaja Tikk, Petros Christopoulos, Laura V. Klotz, Hauke Winter, Michael Kreuter, Bruno R. Steinkraus   +21 more
doaj   +1 more source

Floral resources and habitat affect the composition of hummingbirds at the local scale in tropical mountaintops

Brazilian Journal of Biology
Hummingbird communities tend to respond to variation in resources, having a positive relationship between abundance and diversity of food resources and the abundance and/or diversity of hummingbirds.
LC Rodrigues, M Rodrigues
doaj   +1 more source

Reproductive biology of Amasonia obovata Gleason (Laminaceae) [PDF]

Acta Amazonica, 2014
Floral mechanisms that ensure seed production via autogamy are more likely to occur in species growing in environments where pollination is scarce.
Thays de Assis Schvinn, Anderson Fernandes de Miranda, Celice Alexandre Silva   +2 more
doaj   +2 more sources

Active wing-pitching mechanism in hummingbird escape maneuvers [PDF]

, 2023
Mohammad Nasirul Haque, Bo Cheng, Bret W. Tobalske, Haoxiang Luo   +3 more
openalex   +1 more source

Osteological correlates of the respiratory and vascular systems in the neural canals of Mesozoic ornithurines Ichthyornis and Janavis

The Anatomical Record, EarlyView.
Abstract In birds, the neural canal houses a variety of anatomical structures including the spinal cord, meninges, spinal vasculature, and respiratory diverticula. Among these, paramedullary diverticula and the extradural dorsal spinal vein may leave behind osteological correlates in the form of pneumatic foramina and fossae, and a bilobed geometry of ...
Jessie Atterholt, M. Grace Burton, Mathew J. Wedel, Juan Benito, Ellen Fricano, Daniel J. Field   +5 more
wiley   +1 more source