Results 61 to 70 of about 118,033 (340)

Sacrificial Biofabrication for Vascularization: Concept, Materials, Technologies, and Applications

Advanced Materials, EarlyView.
Vasculature is indispensable for tissue viability in regenerative medicine. The sacrificial biofabrication enables precise fabrication of vascular channels by using temporary templates that are subsequently removed. This review defines the concept and delves into sacrificial materials, surrounding materials, fabrication technologies, and biomedical ...
Jiezhong Shi, Chunyao Wang, Xuan Mei, Ben Zhang, Junxi Wu, Rylie A. Green, Yu Shrike Zhang, Wenmiao Shu   +7 more
wiley   +1 more source

Cable force measurement system design and experiment based on heterodyne laser Doppler vibrometer

Dianzi Jishu Yingyong, 2020
Cable force of bridge cable is an important standard to measure the safety of bridge. According to the working principle of laser Doppler vibration measurement, a small and high-precision laser Doppler vibration measurement system is designed and applied
Li Dongming, Wang Xiang, Xu Junfeng, Chai Xiaopeng, Hu Yabin, Wang Yongtao   +5 more
doaj   +1 more source

Autonomous Implants

Advanced Materials, EarlyView.
An ideal implant should mimic native tissues such that it can integrate, sense, heal, and continue to function, i.e., be autonomous. Although early, there are good steps taken in this way, e.g., the development of stimuli‐responsive, self‐powering, self‐actuating, self‐healing, self‐regenerating, and self‐aware implants.
Jagan Mohan Dodda, Marcel F. Kunrath, Ling Zhou Zhao, Mahdi Bodaghi, Armin Yousefi, Nureddin Ashammakhi   +5 more
wiley   +1 more source

Doppler Effects from Bending of Light Rays in Curved Space-Times [PDF]

, 2006
We study Doppler effects in curved space-time, i.e. the frequency shifts induced on electromagnetic signals propagating in the gravitational field. In particular, we focus on the frequency shift due to the bending of light rays in weak gravitational ...
ANGELO TARTAGLIA, Irwin P., Jacobson R. A., Jones B. W., Kopeikin S. M., LORENZO IORIO, MATTEO LUCA RUGGIERO, Misner C. W., Perlmutter S., Riess A. G., Ruggiero M. L., Sleep N. H.   +11 more
core   +2 more sources

Full‐Domain 3D Digital Twin for Comprehensive Analysis and Validation of Standing Surface Acoustic Wave Generation on LiNbO3 Substrate

Advanced Materials Technologies, EarlyView.
A full‐domain 3D digital twin of a standing surface acoustic wave (SSAW) device on 128° YX LiNbO3 is developed and experimentally validated. The predictive power of the model is confirmed by electrical characterisation and laser Doppler vibrometry measurements, which show excellent agreement with simulations.
Felice Alberto Sfregola, Annalisa Volpe, Andrea Zifarelli, Massimiliano Benetti, Domenico Cannatà, Vincenzo Spagnolo, Pietro Patimisco   +6 more
wiley   +1 more source

Doppler frequency analysis for sound-field sampling with moving microphones

Frontiers in Signal Processing
Moving microphones allow for the fast acquisition of sound-field data that encode acoustic impulse responses in time-invariant environments. Corresponding decoding algorithms use the knowledge of instantaneous microphone positions for relating the ...
Fabrice Katzberg, Marco Maass, Alfred Mertins, Alfred Mertins   +3 more
doaj   +1 more source

A Novel Acquisition Algorithm Based on PMF-apFFT for BOC Modulated Signals

IEEE Access, 2019
Large Doppler shifts are inherent to high-speed relative motion between receiver and satellite and are likely to cause major problems during the code phase acquisition due to the introduced frequency ambiguity.
Yi Pan, Tianqi Zhang, Gang Zhang, Zhongtao Luo   +3 more
doaj   +1 more source

Innovative Multi-Target Estimating with Clutter-Suppression Technique for Pulsed Radar Systems

Sensors, 2020
Linear frequency modulation (LFM) waveforms have high Doppler-shift endurance because of the relative wide modulation bandwidth to the Doppler variation. The Doppler shift of the moving objects, nevertheless, constantly introduces obscure detection range
Jo-Yen Nieh, Yuan-Pin Cheng
doaj   +1 more source

Laser Doppler imaging of microflow [PDF]

Journal of the European Optical Society-Rapid Publications, 2006
We report a pilot study with a wide-field laser Doppler detection scheme used to perform laser Doppler anemometry and imaging of particle-seeded microflow.
Atlan M., Gross M., Leng J.
doaj   +1 more source

Modal Theory of Phase‐Modulated and Frequency‐Shifting Ring Cavities

Advanced Photonics Research, EarlyView.
We present a theoretical and experimental characterization of the optical modes of dispersionless ring cavities with phase modulators or frequency shifters. Their response to arbitrary modulation acts as a filter for phase‐modulated modes that determine the optical output of passive resonators and lasers. This provides a general framework for analyzing
Miguel Cuenca, Haroldo Maestre, Carlos R. Fernández‐Pousa   +2 more
wiley   +1 more source