Results 21 to 30 of about 1,998,737 (342)
Mode conversion via wavefront shaping
Optics Express, 2018 In recent years, wavefront shaping has been utilized to control and correct distorted light for enhancing a bright spot, generation of a Bessel beam or darkening a complete area at the output of a scattering system. All these outcomes can be thought of as enhancing a particular mode of the output field. In this letter, we study the relation between the
Anat, Daniel +3 more
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Vietnam Journal of Mechanics, 2013 This article presents some results on the determination of the vibration shape function of a multiple cracked elastic beam element, which is modeled as an assembly of intact sub-segments connected by massless rotational springs.
Tran Van Lien, Trinh Anh Hao
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Design of a Novel Type Micro-Stirrer Excited by Longitudinal Elastic Wave for Thrombus Dissolution
Journal of Biomechanical Science and Engineering, 2011 This paper presents the method to design a novel micro stirrer for high effective dissolution of cerebral thrombus or blood clot. The micro stirrer is a beam with supported one side and the other side is attached to an asymmetrical stirrer.
Ajoudanian MOHAMMAD +2 more
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Unstable spiral modes in disk-shaped galaxies [PDF]
Proceedings of the National Academy of Sciences, 1976 The mechanisms for the maintenance and the excitation of trailing spiral modes of density waves in diskshaped galaxies, as proposed by Lin in 1969 and by Mark recently, are substantiated by an analysis of the gas-dynamical model of the galaxy. The self-excitation of the unstable mode in caused by waves propagating outwards from the corotation circle ...
Y Y, Lau, C C, Lin, J W, Mark
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Effect of Pulse Shaping on Subharmonic Aided Pressure Estimation In Vitro and In Vivo. [PDF]
, 2016 OBJECTIVES: Subharmonic imaging (SHI) is a technique that uses the nonlinear oscillations of microbubbles when exposed to ultrasound at high pressures transmitting at the fundamental frequency ie, f METHODS: Eight waveforms with different envelopes were ...
Dave, Jaydev K. +11 more
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T-shaped mode coupler for two-mode mode division multiplexing
IEICE Electronics Express, 2011 We propose a novel type of mode coupler consisting of two identical rectangular few-mode waveguides with different orientations. Numerical simulation indicates that mode extinction ratio exceeding 20dB can be achieved by well-aligned waveguides.
Hirokazu Kubota +2 more
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Shaping Effects on Non-Ideal Ballooning Mode [PDF]
Plasma and Fusion Research, 2018 The dependence of shaping effects on the growth rate of collisionless and resistive ballooning mode (CBM/RBM) is numerically investigated. That of the drift ballooning modes (DCBM/DRBM) is also investigated by taking kinetic effects into account. Resistivity scans of linear growth rates of CBM/RBM and DCBM/DRBM in a circular geometry show that both ...
Seto, H +5 more
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Mode Shape-Based Damage Detection Method (MSDI): Experimental Validation
Applied Sciences, 2021 The main principle of vibration-based damage detection in structures is to interpret the changes in dynamic properties of the structure as indicators of damage.
Ivan Duvnjak +3 more
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Mode Shape-Based Damage Localization in Steel Plates Using a Detection Index Based on 2D Wavelet Analysis [PDF]
Journal of Rehabilitation in Civil Engineering, 2023 Structures are subjected to a variety of environmental and loading conditions over time, and minor damage to structural elements may occur. By timely identifying damage and repairing damaged locations, it is possible to prevent the spread and development
Mohtasham Khanahmadi +3 more
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Noise characterization of a pulse train generated by actively mode-locked lasers [PDF]
, 1996 We analyze the entire power spectrum of pulse trains generated by a continuously operating actively mode-locked laser in the presence of noise. We consider the effect of amplitude, pulse-shape, and timing-jitter fluctuations that are characterized by ...
Eliyahu, Danny +2 more
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