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Conventional visual secret sharing (VSS) schemes hide secret images in shares that are either printed on transparencies or are encoded and stored in a digital form. The shares can appear as noise-like pixels or as meaningful images; but it will arouse suspicion and increase interception risk during transmission of the shares. Hence, VSS schemes suffer from(More)
BACKGROUND Brain tissue scarring (gliosis) was believed to be the major cause of epileptic focus after brain injury, and prevention of scarring could reduce the incidence of seizure. We tried the HA coating onto the cortical brain defect of Spraque-Dawley rats to reduce the marginal glial scarring. METHODS A 4 x 2 x 2 mm(3) cortical defect was created in(More)
— In this paper, we develop a novel algorithm to deploy an energy-efficient wireless sensor network (WSN) for the target-location service that is one of the major applications of sensor networks. Such sensor network has to be designed to achieve complete coverage quality of surveillance and full discrimination for predetermined resolution on the sensor(More)
Conventional visual cryptography (VC) suffers from a pixel-expansion problem, or an uncontrollable display quality problem for recovered images, and lacks a general approach to construct visual secret sharing schemes for general access structures. We propose a general and systematic approach to address these issues without sophisticated codebook design.(More)