Results 41 to 50 of about 1,417 (195)

Stochastic Entanglement of Deterministic Origami Tentacles For Robust Robotic Grasping

Advanced Science, EarlyView.
This study introduces an origami tentacle gripper to robustly grasp objects‐in air, underwater, and even in orbital space‐by exploiting a synergy between local, deterministic deformation programming and global, stochastic entanglements. A single origami tentacle can be designed to coil with a simple tendon pull.
Alec Boron, Bokun Zheng, Ziyang Zhou, Noel Naughton, Suyi Li   +4 more
wiley   +1 more source

Mating-induced sexual inhibition in the jumping spider Servaea incana (Araneae: Salticidae): A fast-acting and long-lasting effect. [PDF]

PLoS ONE, 2017
Mating-induced sexual inhibition has been studied extensively as an important facet of many insect mating systems but remains little understood in spiders. Once mated, females of many spider species become unreceptive and aggressive toward males, but the
Vivian Mendez, Rowan H McGinley, Phillip W Taylor   +2 more
doaj   +1 more source

Bio‐Based Polyurethanes for Sustainable and Multifunctional Applications

Advanced Science, EarlyView.
Bio‐based polyurethanes prepared from vegetable oils, lignin, and polysaccharides have attracted increasing interest as alternatives to fossil‐derived polyurethanes. This review summarizes recent progress in their chemistry, structural engineering, and advanced applications, highlighting the roles of feedstocks, chain‐segment design, dynamic covalent ...
Xin Li, Henghui Deng, Shiwei Yu, Jiawei Huang, Zehong Chen, Dawei Zhao, Chaoqun Zhang   +6 more
wiley   +1 more source

Optics of the ultraviolet reflecting scales of a jumping spider [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2007
The jumping spiderCosmophasis umbraticafrom Singapore is strongly sexually dimorphic. The males, but not the females, reflect ultraviolet as well as green–orange light. The scales responsible for this are composed of a chitin–air–chitin sandwich in which the chitin layers are three-quarters of a wavelength thick and the air gap a quarter wavelength ...
Land, M.F., Horwood, J., Lim, M.L.M., Li, D.   +3 more
openaire   +2 more sources

Characterization and Selection of Contractile Actuators for Soft Robotics Operating in the Quasistatic Regime

Advanced Intelligent Systems, EarlyView.
We developed methods to characterize soft contractile actuators using force–displacement measurements in the passive state and the total force in the active state and define the operational range of thermal, electrothermal, and pneumatic muscles. A graphical method enables the selection of an actuator based on the required mechanical force–displacement
Qiong Wang, Liuyang Cheng, Jeongmin Kim, Samuel Tsai, Devin Roach, Sameh Tawfick   +5 more
wiley   +1 more source

Functional relations between locomotor performance traits in spiders and implications for evolutionary hypotheses

BMC Research Notes, 2010
Background Locomotor performance in ecologically relevant activities is often linked to individual fitness. Recent controversy over evolution of extreme sexual size dimorphism (SSD) in spiders centres on the relationship between size and locomotor ...
Taylor Phillip W, Pérez-Staples Diana, Prenter John   +2 more
doaj   +1 more source

Building Community Amidst the Institutional Whiteness of Graduate Study: Black Joy and Maroon Moves in an Academic Marronage

Australian Journal of Social Issues, EarlyView.
ABSTRACT This article reflects on the construction of a supportive community of Black Afro‐diasporic graduate students and their supervisors researching issues relating to race in the field of education in Australia. It draws on the concept of marronage—a term rooted in the fugitive act of becoming a maroon, where enslaved people enacted an escape in ...
Hellen Magoi, Casianus Gemoh, Denise Chapman, Edmund Hypolite, Simon Angok, Melanie Baak, Joel Windle   +6 more
wiley   +1 more source

First record of genus Siler Simon, 1889 (Araneae: Salticidae) from India

Journal of Threatened Taxa, 2015
The jumping spider Siler semiglaucus (Simon, 1901) has been newly reported from India, based on specimens studied from South India. These spiders were observed feeding on all life stages of Technomyrmex ants. 
Siddharth Kulkarni, Sunny Joseph
doaj   +1 more source

NEW RECORDS ON SALTICIDAE AND THERIDIIDAE (ARANEAE) SPIDERS FROM ARMENIA

Bulletin of the Iraq Natural History Museum, 2022
New data on jumping spiders (Salticidae) and tangle-web spiders (Theridiidae) of Armenia are provided on the basis of recently collected specimens in various regions of Armenia.
Noushig Zarikian
doaj   +1 more source

Climatic niche divergence and high‐elevation adaptation promoted rapid diversification of Pimoa spiders in Pan‐Himalaya

Ecography, EarlyView.
The Pan‐Himalayan region harbors exceptional biodiversity, yet the origins and underlying mechanisms driving this remarkable diversity remain poorly understood, especially among species‐rich invertebrates. Pimoa spiders exhibit an intercontinental disjunct distribution across three major mountain regions: the Rockies, the Alps, and the Pan‐Himalaya ...
Xiaoqing Zhang, Zhe Zhao, Bingyue Zhu, Tongyao Jiang, Lili Shao, Stefano Mammola, Jiangni Li, Hao Xu, Bing Li, Shuqiang Li   +9 more
wiley   +1 more source