Results 41 to 50 of about 307 (248)

Variable Stiffness Flexure Structures Enabled by Phase‐Change Gallium and Adhesive Interfacial Locking for Soft Robotic Applications

Advanced Engineering Materials, EarlyView.
A flexure‐based variable stiffness structure is developed by integrating phase‐change modulation and adhesive interfacial locking of gallium. The design enables a wide stiffness variability, transitioning from soft, flexible behavior to rigid, load‐supporting performance.
Sungjin Kim, Sohee John Yoon, Yong‐Lae Park   +2 more
wiley   +1 more source

Spinning boundary correlators from (A)dS4 twistors

Journal of High Energy Physics
We develop a twistor-space framework to compute boundary correlators via a boundary limit of nested Penrose transforms in (A)dS4. Starting from correlators of (anti-)self-dual bulk fields, the boundary limit reproduces the correlators of the dual ...
Mariana Carrillo González, Théo Keseman   +1 more
doaj   +1 more source

Low‐Temperature Imidization of Polyimides (PI) for Scalable Manufacturing of Flexible Wearable Electronics

Advanced Engineering Materials, EarlyView.
Low‐temperature imidization of PEG‐modified polyimide enables fully screen‐printed, roll‐to‐roll fabrication of flexible electrodes on PET substrates, delivering robust mechanical durability and reliable ECG/EMG signal performance for wearable electronics.
Akib Abdullah Khan, Jong‐Hoon Kim
wiley   +1 more source

A new twist on spinning (A)dS correlators

Journal of High Energy Physics
Massless spinning correlators in cosmology are extremely complicated. In contrast, the scattering amplitudes of massless particles with spin are very simple.
Daniel Baumann, Grégoire Mathys, Guilherme L. Pimentel, Facundo Rost   +3 more
doaj   +1 more source

Model of massless relativistic particle with continuous spin and its twistorial description

Journal of High Energy Physics, 2018
We propose a new world-line Lagrangian model of the D= 4 massless relativistic particle with continuous spin and develop its twistorial formulation. The description uses two Penrose twistors subjected to four first class constraints.
I. L. Buchbinder, S. Fedoruk, A. P. Isaev, A. Rusnak   +3 more
doaj   +1 more source

Burns space and holography

Journal of High Energy Physics, 2023
We elaborate on various aspects of our top-down celestial holographic duality wherein the semiclassical bulk spacetime is a 4d asymptotically flat, self-dual Kähler geometry known as Burns space.
Kevin Costello, Natalie M. Paquette, Atul Sharma   +2 more
doaj   +1 more source

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source

An Ode to the Penrose and Witten transforms in twistor space for 3D CFT

Journal of High Energy Physics
Here we discuss the construction of Sp(4; ℝ) invariant objects in the twistor space for three dimensional conformal field theories. The Sp(4; ℝ) invariant projective delta function, alongside the Twistor symplectic dot product invariants form the basis ...
Aswini Bala, Dhruva K. S
doaj   +1 more source

Twistors, the ASD Yang-Mills equations and 4d Chern-Simons theory

Journal of High Energy Physics, 2023
We show that the approaches to integrable systems via 4d Chern-Simons theory and via symmetry reductions of the anti-self-dual Yang-Mills equations are closely related, at least classically.
Roland Bittleston, David Skinner
doaj   +1 more source

Multimodal Data‐Driven Microstructure Characterization

Advanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang, Santiago Benito, Özge Özgün, Sebastian Weber, Markus Stricker   +4 more
wiley   +1 more source