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Topographical Micropatterns
In article number 2103702, Aaron R. Wheeler and co‐workers introduce a new technique for forming permanent topographical micropatterns, relying on optoelectronic tweezers (OET) and in situ UV photopolymerization. For the first time, an OET system was used to assemble working microcapacitive circuits, and the capacity to preserve these systems in photocured resins (which...
Micromanipulation techniques that are capable of assembling nano/micromaterials into usable structures such as topographical micropatterns (TMPs) have proliferated rapidly in recent years, holding great promise in building artificial electronic and photonic microstructures. Here, a method is reported for forming TMPs based on optoelectronic tweezers in either “bottom‐up” or “top‐down” modes, combined...
We utilized a Monte Carlo optimization algorithm on an array of metallic nanoslits of uniform width to maximize the normalized electric field at a focal point. The results indicate optimal hyperspectral focusing of light in the far-field.
We present a novel technique for spectral decomposition of light in a sub-wavelength plasmonic bull's eye grating structure. Controlling plasmon coupling through the variation of groove width enables spatial control over light localization in the grating.
In this study, transmission of JPEG2000 images using an unequal power allocation (UPA) scheme and orthogonal frequency division multiplexing (OFDM) over block-fading frequency-selective channels is presented. A distortion model is provided to evaluate the contribution of each coding pass (CP) in the construction of the received image. The optimisation algorithm exploits the hierarchical structure...
In this paper, we assessed feasibility of using Photoplethysmography (PPG) signal from flexible biosensor as an alternative solution to ECG for monitoring of cardiovascular and pulmonary performance. The potential advantage of this methodology is reduction in power consumption and improvement of complexity of body worn wireless multisensory platform for human physical activity and vital sign monitoring...
In this paper, a transmission of JPEG2000 images using an Unequal Power Allocation (UPA) scheme and Orthogonal Frequency Division Multiplexing (OFDM) technique over a block fading — frequency selective channel is presented. Using instantaneous and average channel state information, power is assigned to each bit in the JPEG2000 bitstream based on its contribution to the decoded image quality. Moreover,...
In this paper, an adaptive scheme is developed for an Unequal Power Allocation (UPA) algorithm in a way to allow variable size grouping of the coding passes to enhance the optimization process at different Signal to Noise Ratio (SNR) values. The optimization algorithm exploits the hierarchical structure of the JPEG2000 images and uses a distortion model along with the channel state information (CSI)...
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