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In this work, an all-optical ultrasound imaging system that is capable of synthesising arbitrary source aperture geometries is presented. This capability is achieved by delivering focussed excitation light onto a spatially extended generating surface, where ultrasound is generated photoacoustically. Using a scanning mirror, the position of the resulting acoustical source was continuously varied to...
A bio array sensing system is newly composed utilizing different phospholipid liposomes encapsulating fluorescent molecules. We have confirmed a high output intensity of fluorescence emission due to the characteristics dependent on the concentration of fluorescent molecules when the fluorescent molecules leak from inside of the liposome through perturbed lipid membrane. After measuring a whole array...
In this paper, a novel microstrip antenna array with low RCS (Radar Cross Section) is presented and analyzed. Under the condition that the incident wave is in grazing angle, a single microstrip antenna which uses the techniques of miniaturization and ground-cut slots is chosen as an element of a 2×2 antenna array. Analysis and optimization of the arrangement of the array is made to realize more reduction...
Many dynamic simulation programs contain complex, irregular memory reference patterns, and require runtime optimizations to enhance data locality. Current approaches periodically stop the execution of an application to reorder the computation or data based on the current program state to improve the data locality for the next period of execution. In this work, we examine the implications that modern...
We demonstrate sparse THz array imaging with an adaptive reconstruction technique. Image artifacts are reduced by over 20 dB with a 56 × 56 element array spanning a 76 × 76 mm aperture.
The hybrid smart antenna algorithm (HSAA) relies on elimination of the array elements with the smallest received signal powers in the beamforming process in order to improve the computational efficiency, and reduce the hardware cost. Earlier computer simulations (Liberti and Rappaport, 1999) suggested that it is possible to further suppress the sidelobes by employing directive array elements. In this...
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