Results 121 to 130 of about 93,460 (307)

Unipolar and bipolar fatigue in antiferroelectric lead zirconate thin films and evidences for switching-induced charge injection inducing fatigue

open access: yes, 2010
For the first time, we show that unipolar fatigue does occur in antiferroelectric capacitors, confirming the predictions of a previous work [Appl. Phys. Lett., 94, 072901 (2009)].
Lou, X. J., Wang, J.
core   +1 more source

Liquid Metal Sensors for Soft Robots

open access: yesAdvanced Robotics Research, EarlyView.
This review thoroughly reviews liquid metal sensors in soft robots. Their unique material properties like high conductivity and good biocompatibility are analyzed. Working principles are classified, and applications in environmental perception, motion detection, and human—robot interaction are introduced.
Qi Zhang   +7 more
wiley   +1 more source

Thermomechanical effects in high-speed seal rubs [PDF]

open access: yes
The analytical effort was aimed at development of numerical model of thermal and mechanical phenomena which occur during seal rub. Finite element programs were develped for studying the temperatures that result from frictional heating during rubs, and ...
Kennedy, Francis E., Jr.
core   +1 more source

A Superlubricated Magnetically Steerable Microcatheter with Integrated Optical and Fluidic Channels

open access: yesAdvanced Robotics Research, EarlyView.
A magnetically steerable microcatheter with integrated optical and fluidic channels is developed for multifunctional navigation in tortuous anatomical environments. A surface‐grafted hydrogel coating enables low‐friction actuation. The device demonstrates stable light and fluid delivery during magnetic manipulation, offering a compact platform for ...
Yuntian Du   +5 more
wiley   +1 more source

SECONDARY FLOW LOSS REDUCTION IN AXIAL TURBINE BLADES BY ENDWALL FENCE APPLICATION

open access: yesHavacılık ve Uzay Teknolojileri Dergisi, 2017
In this study, it is investigated the effects of secondary flows and corresponding aerodynamic loss in axial turbine rotor numerically. To this sense, it is overviewed available literature and presented secondary flow models given by different authors ...
Emre Yıldırım   +1 more
doaj  

Plasmon Injection to Compensate and Control Losses in Negative Index Metamaterials

open access: yes, 2015
Metamaterials have introduced a whole new world of unusual materials with functionalities that cannot be attained in naturally occurring material systems by mimicking and controlling the natural phenomena at subwavelength scales.
Güney, Durdu Ö.   +3 more
core   +1 more source

Compliant Pneumatic Feet with Real‐Time Stiffness Adaptation for Humanoid Locomotion

open access: yesAdvanced Robotics Research, EarlyView.
A compliant pneumatic foot with real‐time variable stiffness enables humanoid robots to adapt to changing terrains. Using onboard vision and pressure control, the foot modulates stiffness within each gait cycle, reducing impact forces and improving balance. The design, cast in soft silicone with embedded air chambers and Kevlar wrapping, offers durable,
Irene Frizza   +3 more
wiley   +1 more source

Research on the energy characteristics of the turning region in the cavitation performance curve of an axial flow pump based on energy flow density and entropy production

open access: yesEngineering Applications of Computational Fluid Mechanics
Cavitation significantly impacts the performance and stability of axial flow pumps, yet the underlying mechanisms driving head rise in the cavitation curve remain inadequately understood.
Lei Yu   +5 more
doaj   +1 more source

Quantum--Classical Interface Based on Single Flux Quantum Digital Logic

open access: yes, 2017
We describe an approach to the integrated control and measurement of a large-scale superconducting multiqubit circuit using a proximal coprocessor based on the Single Flux Quantum (SFQ) digital logic family.
Liebermann, P. J.   +6 more
core   +1 more source

Sleep Alters the Velocity of Physiological Brain Pulsations in Humans

open access: yesAdvanced Science, EarlyView.
Sleep alters I/CSF oscillatory flow, driven by increased respiratory (29%) and vasomotor pulsation (21%) velocities, while cardiovascular pulsations decreased by (22%). Velocity is quantified using optical flow analysis of MREG data. Spectral power increases alongside these pulsations (spatial correlation, r = 0.35 and r = 0.39, respectively ...
Ahmed Elabasy   +13 more
wiley   +1 more source

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