Specific absorption rate (SAR) induced inside human head in the near-field of a mobile phone antenna has been investigated for three different SAR resolutions using Finite Difference in Time Domain (FDTD) method at GSM 900 band. Voxel based anthropomorphic human head model, consisting of different anatomical tissues, is used to calculate the peak SAR values averaged over 10-g, 1-g and 0.1-g mas...

Date of publication: 13 June 2014 T his article presents a survey of recent research on sparsity-driven synthetic aperture radar (SAR) imaging. In particular, it reviews 1) the analysis and synthesis-based sparse signal representation formulations for SAR image formation together with the associated imaging results, 2) sparsity-based methods for wide-angle SAR imaging and anisotropy characteriz...

Staggered SAR is an innovative synthetic aperture radar (SAR) concept, where the pulse repetition interval (PRI) is continuously varied. This, together with digital beamforming (DBF) in elevation, allows high-resolution imaging of a wide continuous swath without the need for a long antenna with multiple azimuth apertures. Criteria for the design of sequences of PRIs and data processing strategi...

This paper presents a survey of recent research on sparsity-driven synthetic aperture radar (SAR) imaging. In particular, it reviews (i) analysis and synthesis-based sparse signal representation formulations for SAR image formation together with the associated imaging results; (ii) sparsity-based methods for wide-angle SAR imaging and anisotropy characterization; (iii) sparsity-based methods fo...

of Dissertation Presented to the Graduate School of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy ADVANCED TECHNIQUES FOR SYNTHETIC APERTURE RADAR IMAGE RECONSTRUCTION By Duc H. Vu May 2012 Chair: Jian Li Major: Electrical and Computer Engineering This dissertation discusses advanced aspects of Synthetic Aperture Radar (SAR). SAR is ...

OBJECTIVE The purpose of this study was to measure specific absorption rate (SAR) during MRI scanning using a human torso phantom through quantification of diffusion coefficients independently of those reported by the scanner software for five 1.5 and 3 T clinical MRI systems from different vendors. METHODS A quadrature body coil transmitted the RF power and a body array coil received the sig...

SAR simulators are important tools for developing new SAR systems as well as for supporting the analysis of acquired SAR data. Using modern graphics cards for SAR simulation, even complex environments can be simulated in real-time. This is realized by implementing SAR geometry and radiometry within standard graphics hardware, which nowadays offers 3D hardware acceleration and programmable graph...

Hong Kong Med J Vol 14 No 1 Supplement 1 February 2008 37 Health, Safety and Environmental Office, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China JK Kwan, SCT Yu United Christian Hospital, 130 Hip Wo Street, Kwun Tong, Kowloon, Hong Kong SAR, China FL Lau Hospital Authority Head office, 147B Argyle Street, Kowloon, Hong Kong SAR, China TY Wong...

Due to the lack of an appropriate symmetry in the acquisition geometry, generalised bistatic SAR cannot benefit from the two main properties of low-to-moderate resolution monostatic SAR: azimuth-invariance and topography-insensitivity. Precise accommodation of azimuth-variance and topography is a real challenge for efficent algorithms working in the Fourier-domain, but can be quite naturally ha...

Sarsasapogenin (SAR) is a steroidal sapogenin that is used as starting material for the industrial synthesis of steroids. It has various pharmacological benefits, such as antitumor and antidepressant activities. Since its effect on melanin biosynthesis has not been reported, we used murine melanocyte melan-a cells to investigate whether SAR influences melanogenesis. In this study, SAR significa...