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IEEE Pervasive Computing, 2011
For many years, pervasive computing research has explored the potential benefits of creating a connection between the virtual world of the Internet, and the physical world we live in. The Near Field Communication (NFC) standard might, at last, be the technology that makes this vision-sometimes referred to as the Internet of things-a ubiquitous reality.
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For many years, pervasive computing research has explored the potential benefits of creating a connection between the virtual world of the Internet, and the physical world we live in. The Near Field Communication (NFC) standard might, at last, be the technology that makes this vision-sometimes referred to as the Internet of things-a ubiquitous reality.
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Near-Field Diffraction Tomography
Ultrasonic Imaging, 2002We propose an algorithm that deals with broadband ultrasonic signals acquired in the near-field domain using probes close to the skin. This technique is designed for diffraction tomography of compact support objects interrogated by spherical waves (small transducers).
Mensah, Serge, Ferrière, Robert
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THE NEAR FIELD TO FAR FIELD TRANSFORMATION
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 1995If a scattering problem is solved by finite element, finite volume or finite difference methods, it is necessary to predict the far field pattern (or radar cross‐section) by using a near field to far field transformation. Usually this is done using the Stratton‐Chu integral relations, which give the far field pattern in terms of a near field surface ...
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Near field representation by far-field samples
1983 Antennas and Propagation Society International Symposium, 2005The pseudo sampling technique is applied in an efficient near-field ...
G. D’Elia +2 more
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Recording of optical near fields in remote locations by near-field holography
Optics Letters, 2001We propose a method of near-field recording in a space that is quite apart from the original source (generator) of optical near fields. The method is based on the recently developed technique of near-field holography. Experiments based on our method have shown that near fields that originate from sub-diffraction-limit-sized objects can be stored in a ...
K Y, Kim, B, Lee
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2015 IEEE International Symposium on Electromagnetic Compatibility (EMC), 2015
This paper presents efficient methods to transform, interpolate and filter recorded near- and far-fields on spherical surfaces, based on a spectral decomposition of these fields in spherical harmonics. Combining a Fast Fourier Transform (FFT), Discrete Cosine Transform (DCT) and Discrete Sine Transform (DST) reduces the computation time of existing ...
B. Boesman +3 more
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This paper presents efficient methods to transform, interpolate and filter recorded near- and far-fields on spherical surfaces, based on a spectral decomposition of these fields in spherical harmonics. Combining a Fast Fourier Transform (FFT), Discrete Cosine Transform (DCT) and Discrete Sine Transform (DST) reduces the computation time of existing ...
B. Boesman +3 more
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Near-field ultrasound tomography
The Journal of the Acoustical Society of America, 2007In this paper, a near-field tomographic solution is introduced to solve the imaging problem of fluid objects assumed to be weakly heterogeneous (Born approximation) and excited by spherical waves. The solution to the forward problem is based on the Huygens-Fresnel principle which describes the scattered field as the result of the interference scheme of
Serge, Mensah, Emilie, Franceschini
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Terahertz spectroscopy in the near field
Frontiers in Optics 2007/Laser Science XXIII/Organic Materials and Devices for Displays and Energy Conversion, 2007We observe a terahertz field enhancement in the junction between a sub-wavelength metal probe tip and a metallic substrate. We exploit this in the first observation of a metal-insulator transition using terahertz near-field techniques.
Zhan, Hui +7 more
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Near‐field mapping of surface polariton fields
Journal of Microscopy, 2001Using the general approach to image formation in collection near‐field optical microscopy, I derive the symmetry relations for the amplitude coupling coefficients in the case of a weakly guiding single‐mode fibre terminated with a probe tip possessing axial symmetry.
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