scholarly journals Quasi-analytical model for scattering infrared near-field microscopy on layered systems

2012 ◽  
Vol 20 (12) ◽  
pp. 13173 ◽  
Author(s):  
Benedikt Hauer ◽  
Andreas P. Engelhardt ◽  
Thomas Taubner
Keyword(s):  
Analytical Model ◽  
Near Field ◽  
Layered Systems

A semi-analytical model of a near-field optical trapping potential well

2017 ◽  
Vol 122 (16) ◽  
pp. 163101 ◽  
Author(s):  
Mohammad Asif Zaman ◽  
Punnag Padhy ◽  
Lambertus Hesselink
Keyword(s):  
Analytical Model ◽  
Optical Trapping ◽  
Near Field ◽  
Trapping Potential ◽  
Potential Well

Study on Long-Period Inelastic Spectra of near-Fault Pulse-Like Strong Ground Modeled Using Analytical Model

2011 ◽  
Vol 374-377 ◽  
pp. 2316-2319
Author(s):  
Chun Feng Li ◽  
Wei Xin Tian ◽  
Zhuo Lin
Keyword(s):  
Ground Motion ◽  
Analytical Model ◽  
Ground Motions ◽  
Near Field ◽  
Near Fault ◽  
Long Period ◽  
Acceleration Time Histories ◽  
Long Period Ground Motion ◽  
Ground Motion Records ◽  
Strong Ground

Because the parameters of Mavroeidis analytical model of pulse-like strong ground motion have an unambiguous physical meaning, the analytical model has been calibrated using a large number of actual near-field ground-motion records, and It can successfully simulate available near-fault pulse-like acceleration time histories, in this paper, we synthesize ground motions using the model to investigate elasto-plastic earthquake responses of long period single-degree-of-freedom system to the pulse-like ground motions, revealing the elasto-plastic long-period ground motion characteristics of pulse-like ground motion.

scholarly journals Near-field wireless sensing of single and multiple open-ended micro coils

2013 ◽  
Vol 2 (1) ◽  
pp. 35-43 ◽  
Author(s):  
A. Yousaf ◽  
J. M. Boccard ◽  
F. A. Khan ◽  
L. M. Reindl
Keyword(s):  
Analytical Model ◽  
Near Field ◽  
Coupled System ◽  
Comsol Multiphysics ◽  
Measured Signal ◽  
Wireless Sensing ◽  
Coil Inductance ◽  
Small Loop ◽  
Least Squares Approach ◽  
Strong Agreement

Abstract. In this work we present near-field wireless sensing of single and multiple open-ended micro coils using an electrically small loop antenna. Wirelessly characterized parameters of open-ended micro coils include its resonance frequency, quality factor and inductance. Moreover a wireless frequency-dependent analytical model was developed. Micro coil inductance was extracted from the wirelessly measured signal using a constraint-based least-squares approach. Wireless measurements and analytical fit of micro coils are in strong agreement which validates the analytical model. Finite element method (FEM) simulations of the coupled system were done in COMSOL Multiphysics.

Near-field scanning optical microscopy

1986 ◽  
Vol 44 ◽  
pp. 642-643
Author(s):  
E. Betzig ◽  
A. Harootunian ◽  
M. Isaacson ◽  
A. Lewis
Keyword(s):  
Near Field ◽  
Optical Microscope ◽  
Visible Radiation ◽  
Field Methods ◽  
Optical Elements ◽  
Optical Region ◽  
Order Of Magnitude ◽  
Nondestructive Imaging ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

In general, conventional methods of optical imaging are limited in spatial resolution by either the wavelength of the radiation used or by the aberrations of the optical elements. This is true whether one uses a scanning probe or a fixed beam method. The reason for the wavelength limit of resolution is due to the far field methods of producing or detecting the radiation. If one resorts to restricting our probes to the near field optical region, then the possibility exists of obtaining spatial resolutions more than an order of magnitude smaller than the optical wavelength of the radiation used. In this paper, we will describe the principles underlying such "near field" imaging and present some preliminary results from a near field scanning optical microscope (NS0M) that uses visible radiation and is capable of resolutions comparable to an SEM. The advantage of such a technique is the possibility of completely nondestructive imaging in air at spatial resolutions of about 50nm.

Principles of Planar Near-Field Antenna Measurements

2007 ◽  
Author(s):  
Stuart Gregson ◽  
John McCormick ◽  
Clive Parini
Keyword(s):  
Near Field ◽  
Antenna Measurements
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