Results 161 to 170 of about 8,460,970 (228)

Dynamic Fluorescence Modulation via Light‐Driven Competitive Protonation

open access: yesAdvanced Optical Materials, EarlyView.
A two‐component molecular system demonstrates reversible, light‐driven fluorescence write–erase cycling and thermal imaging. Illumination of a merocyanine photoacid transfers a proton to a highly efficient fluorescent pyridinium dye, switching its emission color; thermal relaxation reverses the process in the dark.
Serena X. Liu   +10 more
wiley   +1 more source

Intramolecular Direct Arylation Enables Access to Diverse Photophysical Properties for π‐Expanded 1,4‐Dihydropyrrolo[3,2‐b]pyrroles

open access: yesAdvanced Optical Materials, EarlyView.
The unique combination of photophysical properties for π‐expanded 1,4‐dihydropyrrolo[3,2‐b]pyrroles (DHPPs) can be reached via a new synthetic approach. π‐Expanded DHPPs possessing electron‐withdrawing functionalities with emission reaching 700 nm, as well as large double helical systems were prepared and investigated.
Damian Kusy   +10 more
wiley   +1 more source

Asymmetry in Skipping Enhances Viability Against Control Input Noise

open access: yesAdvanced Robotics Research, EarlyView.
Quadruped animals use asymmetric galloping gaits at high speeds, yet the functional role of this asymmetry remains unclear. This study shows that left–right asymmetry in touchdown angles enhances robustness to control noise. Using a simple two‐legged locomotion model and viability theory, it demonstrates that asymmetric skipping substantially enlarges ...
Yuichi Ambe, Alvin So, Shinya Aoi
wiley   +1 more source

Continuum Mechanics Modeling of Flexible Spring Joints in Surgical Robots

open access: yesAdvanced Robotics Research, EarlyView.
A new mechanical model of a tendon‐actuated helical extension spring joint in surgical robots is built using Cosserat rod theory. The model can implicitly handle the unknown contacts between adjacent coils and numerically predict spring shapes from straight to significantly bent under actuation forces.
Botian Sun   +3 more
wiley   +1 more source

Adaptation before and one year after liver transplantation: a longitudinal grounded theory study. [PDF]

open access: yesInt J Qual Stud Health Well-being
Brantmark A   +3 more
europepmc   +1 more source

A Soft Robotic Fish With a Dielectric Elastomer Actuator Body and Negative Stiffness Spine

open access: yesAdvanced Robotics Research, EarlyView.
This work introduces a bio‐mimetic soft robotic fish driven by fiber‐reinforced dielectric elastomer actuators integrated as its body. By prestretching this active skin against a flexible spine, a negative stiffness system is created, enabling large‐amplitude bending.
Markus Koenigsdorff   +4 more
wiley   +1 more source

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