Results 41 to 50 of about 51,507 (363)

Aerodynamic Effects of Corrugation on Dragonfly Hindwing

Hangkong gongcheng jinzhan, 2019
To study aerodynamic performance of the dragonfly wing at gliding flight at different Reynolds numbers, a three-dimensional model of the dragonfly hindwing with corrugation and a three-dimensional flat plate with the same shape of the dragonfly hindwing ...
Luo Yun, He Guoyi, Wang Qi, Song Hang, Chen Donghui   +4 more
doaj   +1 more source

Integration of Open-Source URBANopt and Dragonfly Energy Modeling Capabilities into Practitioner Workflows for District-Scale Planning and Design

Energies, 2021
High-performance districts and communities offer opportunities for reducing energy use, emissions, and costs, and can be instrumental in helping cities achieve their climate goals.
T. Vishnu Charan, Christopher Mackey, Ali Irani, B. Polly, S. Ray, K. Fleming, Rawad El Kontar, N. Moore, Tarek Elgindy, D. Cutler, M. Roudsari, David Goldwasser   +11 more
semanticscholar   +1 more source

Formation of Wormholes by Dark Matter in the Galaxy Dragonfly 44

, 2018
Recently, ultra diffuse galaxy (UDG) of Dragonfly 44 in the Coma Cluster was observed and observations of the rotational speed suggest that its mass is almost same as the mass of the Milky Way. On the other hand, interestingly, the galaxy emits only 1 \%
Halilsoy, Mustafa, Islam, Sayeedul, Rahaman, Farook, Övgün, Ali   +3 more
core   +1 more source

Impact of a small artificial water source on the diversity of odonates (Insecta : Odonata) in an urban landscape [PDF]

Arthropods, 2021
Rapid urbanisation is mainly responsible for the degradation and fragmentation of natural ecosystems in urban areas. Dragonflies and damselflies (Odonata) constitute an important part of urban biodiversity.
Pawan U. Gajbe
doaj  

Future Prospects: Deep Imaging of Galaxy Outskirts using Telescopes Large and Small

, 2016
The Universe is almost totally unexplored at low surface brightness levels. In spite of great progress in the construction of large telescopes and improvements in the sensitivity of detectors, the limiting surface brightness of imaging observations has ...
A. Monachesi, A.B. Meinel, D. Streich, D.P. Hamilton, I.R. King, J. Kormendy, J.G. DeVore, M. Milgrom, M. Mouhcine, R. Ibata, R. Racine, R.A. Bernstein   +11 more
core   +1 more source

Hybrid Binary Dragonfly Algorithm with Simulated Annealing for Feature Selection

SN Computer Science, 2021
There are various fields are affected by the growth of data dimensionality. The major problems which are resulted from high dimensionality of data including high memory requirements, high computational cost, and low machine learning classifier ...
H. Chantar, Mohammad Tubishat, Mansour Essgaer, Seyedali Mirjalili   +3 more
semanticscholar   +1 more source

Expanding the Cultural Reach of Zoos

Journal of Zoological and Botanical Gardens
It is surprising that, despite focusing on delivering engaging and informative content to zoo and aquarium visitors nationwide, relatively few zoos or aquariums incorporate culture or the extensive species and place-based knowledge of local communities ...
Alexandra Vaccaro, Jill Korach
doaj   +1 more source

DNA Barcoding and New Records of Odonates (Insecta: Odonata) from Paraíba State, Brazil

Diversity, 2022
Odonates (Insecta: Odonata) are important insects in the food chains of freshwater environments around the world, being used as a model species for areas of behavior and analysis of environmental quality. In Brazil, especially in the Northeastern region,
Ricardo Koroiva, Vanessa Gabrielle Nóbrega Gomes, Diogo Silva Vilela   +2 more
doaj   +1 more source

The impacts of habitat disturbance on adult and larval dragonflies (Odonata) in rainforest streams in Sabah, Malaysian Borneo [PDF]

, 2017
$\textbf{1.}$ Dragonfly assemblages (Odonata: comprising damselflies, Zygoptera; and dragonflies, Anisoptera) in Southeast Asian rainforests are extremely diverse but increasingly threatened by habitat disturbance, including logging and conversion of ...

core   +2 more sources

The Effect of the Phase Angle between the Forewing and Hindwing on the Aerodynamic Performance of a Dragonfly-Type Ornithopter

Aerospace, 2016
Dragonflies achieve agile maneuverability by flapping four wings independently. Different phase angles between the flapping forewing and hindwing have been observed during various flight modes.
Hidetoshi Takahashi, Alice Concordel, Jamie Paik, Isao Shimoyama   +3 more
doaj   +1 more source