Results 71 to 80 of about 109,795 (259)

Negative Group Velocity [PDF]

, 2000
The group velocity for pulses in an optical medium can be negative at frequencies between those of a pair of laser-pumped spectral lines. The gain medium then can amplify the leading edge of a pulse resulting in a time advance of the pulse when it exits ...
Hamilton W. R., Kirk T. McDonald
core   +4 more sources

Real‐Time 3D Ultrasound Imaging with an Ultra‐Sparse, Low Power Architecture

Advanced Healthcare Materials, EarlyView.
This article presents a novel, ultra‐sparse ultrasound architecture that paves the way for wearable real‐time 3D imaging. By integrating a unique convolutional array with chirped data acquisition, the system achieves high‐resolution volumetric scans at a fraction of the power and hardware complexity.
Colin Marcus, Md Osman Goni Nayeem, Aastha Shah, Jason Hou, Shrihari Viswanath, Maya Eusebio, David Sadat, Anantha P. Chandrakasan, Tolga Ozmen, Canan Dagdeviren   +9 more
wiley   +1 more source

Local seismic response studies in the north-western portion of the August 24th, 2016 Mw 6.0 earthquake affected area. The case of Visso village (central Apennines)

Annals of Geophysics, 2016
In this work, we investigate the possible causes of the differential damaging observed in Visso village (central Apennines, about 28 km north from the August 24th, 2016 Mw 6.0 earthquake epicenter).
Iolanda Gaudiosi, Gianluca Vignaroli, Pietro Sirianni, Silvia Giallini, Federico Mori, Federica Polpetta, Roberto Razzano, Maurizio Simionato, Massimiliano Moscatelli   +8 more
doaj   +1 more source

Bioinspired Adaptive Sensors: A Review on Current Developments in Theory and Application

Advanced Materials, EarlyView.
This review comprehensively summarizes the recent progress in the design and fabrication of sensory‐adaptation‐inspired devices and highlights their valuable applications in electronic skin, wearable electronics, and machine vision. The existing challenges and future directions are addressed in aspects such as device performance optimization ...
Guodong Gong, You Zhou, Qingxiu Li, Wenyu Zhao, Sunyingyue Geng, Hangfei Li, Yan‐Bing Leng, Shirui Zhu, Guanglong Ding, Yongbiao Zhai, Ziyu Lv, Ye Zhou, Su‐Ting Han   +12 more
wiley   +1 more source

3D Anodic Alumina Nanoarchitectures: A Decade of Progress from Foundational Science to Functional Metamaterials

Advanced Materials, EarlyView.
Ordered three‐dimensional anodic aluminum oxide (3D‐AAO) nanoarchitectures with longitudinal and transverse pores enable architecture‐driven metamaterials. The review maps fabrication advances, including hybrid pulse anodization, and shows how 3D‐AAO templates tailor properties across magnetism, energy, catalysis, and sensing.
Marisol Martín‐González
wiley   +1 more source

Characterization of Fatigue Damage in Hadfield Steel Using Acoustic Emission and Machine Learning-Based Methods

Sensors
Structural health monitoring (SHM) of fatigue cracks is essential for ensuring the safe operation of engineering equipment. The acoustic emission (AE) technique is one of the SHM techniques that is capable of monitoring fatigue-crack growth (FCG) in real
Shengrun Shi, Dengzun Yao, Guiyi Wu, Hui Chen, Shuyan Zhang   +4 more
doaj   +1 more source

Connecting Numerical Relativity and Data Analysis of Gravitational Wave Detectors

, 2015
Gravitational waves deliver information in exquisite detail about astrophysical phenomena, among them the collision of two black holes, a system completely invisible to the eyes of electromagnetic telescopes.
A. Buonanno, A. Buonanno, A.H. Mroue, A.M. Abrahams, B. Aylott, B. Aylott, B. Bruegmann, B. Bruegmann, B. Vaishnav, B.J. Kelly, C. Capano, C. Cutler, C. Gundlach, C.O. Lousto, C.O. Lousto, E. Berti, E. Berti, E.W. Leaver, F. Ohme, F. Pretorius, G. Khanna, G. Lovelace, G. Lovelace, G.B. Cook, G.M. Harry, I. Hinder, I. Kamaretsos, I. Kamaretsos, I. MacDonald, J. Aasi, J. Aasi, J. Abadie, J. Abadie, J.D. Schnittman, J.G. Baker, J.G. Baker, J.G. Baker, J.S. Read, K. Somiya, L. Pekowsky, M. Alcubierre, M. Alcubierre, M. Campanelli, M. Hannam, M. Hannam, M. Hannam, M. Kesden, N. Andersson, N. Andersson, N. Cornish, O. Dreyer, P. Ajith, P. Ajith, P. Kumar, P.R. Brady, R. Gomez, S. Brandt, S. Brandt, S. Fischetti, S. Privitera, T. Baumgarte, W.H. Press, Y. Pan   +62 more
core   +1 more source

Asymmetry of the Ferroelectric Phase Transition in BaTiO3

Advanced Materials, EarlyView.
Phase transitions are typically assumed to behave identically in forward and reverse. This work shows that in the ferroelectric material barium titanate this is not true: heating drives an abrupt, first‐order jump, while cooling gives a smooth, continuous change.
Asaf Hershkovitz, Elangovan Hemaprabha, Rajesh Mandal, Pravin Kavle, Jamil Tanus, Maya Barzilay, Ching‐Che Lin, David Spirito, Semën Gorfman, Bo Wang, Ignacio J. Villar‐García, Neus Domingo, Long‐Qing Chen, Lane W. Martin, Yachin Ivry   +14 more
wiley   +1 more source

Pioneering Data Processing for Convolutional Neural Networks to Enhance the Diagnostic Accuracy of Traditional Chinese Medicine Pulse Diagnosis for Diabetes

Bioengineering
Traditional Chinese medicine (TCM) has relied on pulse diagnosis as a cornerstone of healthcare assessment for thousands of years. Despite its long history and widespread use, TCM pulse diagnosis has faced challenges in terms of diagnostic accuracy and ...
Wei-Chang Yeh, Chen-Yi Kuo, Jia-Ming Chen, Tien-Hsiung Ku, Da-Jeng Yao, Ya-Chi Ho, Ruei-Yu Lin   +6 more
doaj   +1 more source

Mechanism of Collapse, Sensitivity to Ground Motion Features, and Rapid Estimation of the Response of Tall Steel Moment Frame Buildings to Earthquake Excitation [PDF]

, 2011
This study explores the behavior of two tall steel moment frame buildings and their variants under strong earthquake ground shaking through parametric analysis using idealized ground motion waveforms.
Krishnan, Swaminathan, Muto, Matthew
core