Results 51 to 60 of about 22,111 (245)

Transmission wavefront shearing interferometry for photoelastic materials [PDF]

, 2009
A general analysis and experimental validation of transmission wavefront shearing interferometry for photoelastic materials are presented. These interferometers applied to optically isotropic materials produce a single interference pattern related to one
Bhattacharya, Kaushik, Kramer, Sharlotte L. B., Ravichandran, Guruswami   +2 more
core   +1 more source

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

Advanced 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, Hiroshi Kaminaga, Philippe Fraisse, Gentiane Venture   +3 more
wiley   +1 more source

EPUN: Efficient 2D Phase Unwrapping With a Lightweight Neural Network

IEEE Access
Phase unwrapping is a fundamental task. In recent years, deep learning has been widely used for phase unwrapping in different fields. Nevertheless, along with the unwrapping performance improvement of deep networks, their structures become more and more ...
Zhiliang Zhang, Fang Luo, Ying Liu, Yin Zhang   +3 more
doaj   +1 more source

An alternative method for phase-unwrapping of interferometric data [PDF]

Journal of the European Optical Society-Rapid Publications, 2014
In this paper we present a novel algorithm for phase unwrapping where only a subset of data from the wrapped phase map is used to reconstruct the unwrapped phase map as a linear combination of radial basis functions (RBF’s).
de la Rosa-Miranda E., Gonzalez-Ramirez E., Villa-Hernández J. J., Berriel-Valdos L. R., Olvera-Olvera C., de la Rosa-Vargas J. I., Saucedo-Anaya T., Arceo Olague J. G., Alaniz-Lumbreras D., Castaño V. M.   +9 more
doaj   +1 more source

On the Origins of Toughness in Corymbia calophylla (Marri Tree) Nuts

Advanced Science, EarlyView.
We uncover the natural toughening mechanisms of the marri nut, including fiber pullout, crack deflection, and a viscoelastic matrix, which enable exceptional energy absorption and ductility comparable to Teflon, with an elastic modulus similar to acrylic.
Wegood M. Awad, Ahmed S. Dalaq, Marieh B. Al‐Handawi, Rezo Getsadze, Oraib Al‐Ketan, James Weston, Mohammed Daqaq, Panče Naumov   +7 more
wiley   +1 more source

C-HRNet: High Resolution Network Based on Contexts for Single-Frame Phase Unwrapping

IEEE Photonics Journal
Phase unwrapping is an important research direction in fringe projection profilometry. Improving the accuracy of phase unwrapping from a single wrapped phase map has been a research focus.
Wenbo Zhao, Jing Yan, Dongyang Jin, Jing Ling   +3 more
doaj   +1 more source

Least-squares Fourier phase estimation from the modulo 2Pi bispectrum phase [PDF]

, 1991
The recovery of Fourier phases from measurements of the bispectrum occupies a vital role in many astronomical speckle imaging schemes. In arecent paper [J. Opt. Soc. Am.
Haniff, Christopher A.
core  

Neural Fields for Highly Accelerated 2D Cine Phase Contrast MRI

Advanced Science, EarlyView.
ABSTRACT 2D cine phase contrast (CPC) MRI provides quantitative information on blood velocity and flow within the human vasculature. However, data acquisition is time‐consuming, motivating the reconstruction of the velocity field from undersampled measurements to reduce scan times. In this work, neural fields are proposed as a continuous spatiotemporal
Pablo Arratia, Martin J. Graves, Mary McLean, Carolin Pirkl, Carola‐Bibiane Schönlieb, Timo Schirmer, Florian Wiesinger, Matthias J. Ehrhardt   +7 more
wiley   +1 more source

Statistical mechanics approach to the phase unwrapping problem

, 2000
The use of Mean-Field theory to unwrap principal phase patterns has been recently proposed. In this paper we generalize the Mean-Field approach to process phase patterns with arbitrary degree of undersampling.
Alberto Refice, Ching, Fried, Geman, Ghiglia, Gidas, Guerriero, Hjalmarson, Luciano Guerriero, Morita, Nakadate, Ray, Sebastiano Stramaglia, Stramaglia, Tanaka, Yuille, Zhang   +16 more
core   +1 more source

Multiscale Architecture and Mechanics of the Cell Nucleus: Implications for Disease, Bioengineering and Nanomedicine

Advanced Science, EarlyView.
Nuclear mechanical properties are inherently scale‐dependent, arising from a hierarchical architecture that spans DNA, chromatin, the nuclear envelope, and condensates. Experimental techniques and theoretical models are integrated into a cohesive multiscale framework linking nanoscale structural features to organelle‐level mechanical behavior.
Xinran Liu, Xin Chen, Qingyang Zhao, Weikang Tan, Lingrui Zhu, Kin Liao, Vincent Chan, Nicolae Goga, Winfred O. Larkotey, Yang Li, Yinghui Shi, Wenya Shu, Lin Wang, Weiqing Wang, Tian Jian Lu, Yulong Han   +15 more
wiley   +1 more source