This paper suggests a cooperative spectrum sensing using dynamic double thresholds energy detection and adaptive grid search to obtain the highest probability detection. The proposed double thresholds are adaptive to noise fluctuation. A new fusion method combined of weighting and voting is used in cooperative sensing. Further, in order to obtain the best sensing performance, we firstly use ada...

It is considered to be the most suitable solution for large scale elections to design an electronic voting scheme using blind signatures and anonymous channels. Based on this framework, Okamoto first proposed a receipt-free voting scheme [30] for large scale elections. However, in the following paper, Okamoto [31] proved that the scheme [30] was not receipt-free and presented two improved schem...

In the world of digital image and video processing, encoding and/or compression errors are often assessed in terms of the signal dimensions (e.g., RGB or YCBCR) using quantities such as RMS deviation or signal-to-noise ratio with little or no regard for the radiometric linearity of the quantities or the ultimate appearance to observers. When visual models are utilized it is usually with the aim...

This introduction to the Public Choice special issue on “Quadratic Voting and the Public Good” provides an opinionated narrative summary of the contents and surveys the broader literature related to Quadratic Voting (QV). QV is a voting rule, proposed by one of us (Weyl, 2012; Lalley and Weyl, 2016) building off earlier work by Groves and Ledyard (1977) and Hylland and Zeckhauser (1980), where ...

BACKGROUND Highlighted text in the Internet (i.e., hypertext) is predominantly blue and underlined. The perceptibility of these hypertext characteristics was heavily questioned by applied research and empirical tests resulted in inconclusive results. The ability to recognize blue text in foveal and parafoveal vision was identified as potentially constrained by the low number of foveally centere...

PURPOSE There has been a proliferation of available dental x-ray detectors over the recent past. The purpose of this short technical report is to provide a basic comparison of spatial resolution, contrast perceptibility, and relative exposure latitudes of 18 current dental x-ray detectors, including solid-state systems (CCD and CMOS), photostimulable phosphors, and analog film. METHODS Spatia...