Recently, dielectric elastomer actuators (DEAs) have gathered interest for soft robotics due to their low cost, light weight, large strain, low power consumption, and high energy density. However, developing reliable, compliant electrodes for DEAs remains an ongoing challenge due to issues with fabrication, uniformity of the conductive layer, and mechanical stiffening of the actuators caused by...

Submersible mixers are widely used in the sewage treatment process various fields, such as agriculture and industry. They mainly responsible for pushing flow mixing activated sludge particles a pool. Based on CFD-DEM coupling method under Euler–Lagrange framework, solid–liquid two-phase of submersible mixer was simulated this paper, motion characteristics distribution laws pool were studied axi...

Rouxicrinus vestitus new genus, new species, collected during submersible dives at depths of 421–887 m near Barbados, Colombia and the Bahamas is described, and notes on ecology are included. It is referred to the family Septocrinidae Mironov, 2000, which now comprises three genera, Zeuctocrinus A.M. Clark, 1973, Septocrinus Mironov, 2000, and Rouxicrinus new genus. This new genus differs signi...

Locomotor activity by diving marine mammals is accomplished while breath-holding and often exceeds predicted aerobic capacities. Video sequences of freely diving seals and whales wearing submersible cameras reveal a behavioral strategy that improves energetic efficiency in these animals. Prolonged gliding (greater than 78% descent duration) occurred during dives exceeding 80 meters in depth. Gl...

This paper describes short range and tactile optical fibre sensors for marine applications. The sensors are designed for obstacle avoidance on unmanned underwater vehicles (UUVs) operating in confined spaces, but have other possible applications. The fibre sensors augment the sensory abilities derived from ultrasonic and other sensors employed for marine proximity measurement. Of particular int...

We are developing autonomous underwater vehicles for exploration and inspection tasks. Our objectives are to enable these submersible robots to autonomously search in regular patterns, follow along fixed natural and artificial features, and swim after dynamic targets. We have developed a method of visually-guiding autonomous land vehicles using correlationbased feature tracking to follow target...

— Based on the collections of the Johnson-SeaLink I submersible, new records of 14 stylasterid species are reported from the Galapagos Islands, including one new species: Lepidopora concatenata. Five stylasterid species are reported from Cocos Island, including two new species: Pliobothrus fistulosus and Stylaster cocosensis. These are the first records of stylasterids from Cocos Island, three ...