Results 111 to 120 of about 208,538 (280)

Dynamic Current Routing in Conductive Liquid Crystal Elastomers for Complex Deformation Actuators

open access: yesAdvanced Materials Technologies, EarlyView.
This work introduces a novel actuation control strategy in which electrical stimulation generates localized Joule heating in conductive liquid crystal elastomer (LCE) surfaces, enabling complex 3D deformations from a single homogeneous surface without preprogramming.
Gloria PouWai Lei   +2 more
wiley   +1 more source

Evaluation of Sodium Alginate as a Drag Reduction Agent in Flowing Fluids: Effects of Concentration, Temperature, and Flow Rate

open access: yes
Abstract Sodium alginate, a natural polymer, is widely utilized in various fields due to its exceptional drag reduction properties. This study systematically investigates the effects of sodium alginate concentration, flow rate, and temperature on the drag reduction rate.
Zhensong Cheng   +7 more
openaire   +1 more source

Irish Households, Assessing the Impact of the Economic Crisis [PDF]

open access: yes
The impact of the changing economic environment on Irish households has been significant, with net worth falling 30 per cent since 2006. This article uses Quarterly Financial Accounts data to investigate how they have adjusted to the vastly different ...
Cussen, Mary, Phelan, Gillian
core  

Development of Heat Engines Powered by Twisted and Coiled Polymer Fiber Actuators

open access: yesAdvanced Materials Technologies, EarlyView.
Continuously rotating engines driven by thermally responsive actuating materials can turn waste heat into useful energy. For the first time heat engines operated by twisted and coiled polymer fiber actuators are demonstrated with engine design guided by two simple analytical models.
Geoffrey M. Spinks   +2 more
wiley   +1 more source

Toward a consistent evolution of the quark-gluon plasma and heavy quarks

open access: yes, 2016
Heavy-quark observables in ultrarelativistic heavy-ion collisions, like the nuclear modification factor and the elliptic flow, give insight into the mechanisms of high-momentum suppression and low-momentum thermalization of heavy quarks. Here, we present
Aichelin, Jörg   +3 more
core   +3 more sources

On–Off Switchable Micromotors for Use in Steerable Microvehicles

open access: yesAdvanced Robotics Research, EarlyView.
Electrically controllable micromotors and microvehicles are developed by tuning the diffusion of the fuel. Self‐propelled micromotors using bubble propulsion show great promise for miniaturized devices with multiuse purposes such as cargo delivery and sensing. However, there is currently no method to electrically switch the micromotors on or off. Here,
Hugo Severinsson   +3 more
wiley   +1 more source

An Experimental Study of the Flow Field and Air Distribution Strategy on a Flat Plate with Air Injection

open access: yesJournal of Applied Fluid Mechanics, 2018
In order to investigate the effect of air flow rate distribution on plate flow field characteristics, an experiment of plate with air injection was conducted in a high speed towing tank.
H. Wu
doaj  

Modulus‐Switchable Miniature Robots for Biomedical Applications: A Review

open access: yesAdvanced Robotics Research, EarlyView.
Materials, robot designs, proof‐of‐concept functions, and biomedical applications of modulus‐switchable miniature robots. Miniature soft robots have shown great potential in biomedical applications due to their excellent controllability and suitable mechanical properties in biological environments.
Chunyun Wei, Yibin Wang, Jiangfan Yu
wiley   +1 more source

Drag reduction effect by streamwise traveling wave-like wall-surface heating/cooling in a turbulent channel flow

open access: yesJournal of Thermal Science and Technology
We conduct a direct numerical simulation of a turbulent channel flow controlled using the buoyancy force induced by streamwise traveling wave-like wall-surface heating/cooling under a constant pressure gradient condition.
Yusuke NABAE   +2 more
doaj   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

open access: yesAdvanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui   +5 more
wiley   +1 more source

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