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OBJECTIVES The purpose of this study was to determine the plaque removal effectiveness of a new powered toothbrush and compare it to that of a manual brush. METHODS This examiner-blind, randomized study used a cross-over design. Sixty-two (62) qualifying subjects were randomly assigned either to the powered brush (Arm & Hammer Spinbrush™ Truly Radiant™(More)
Watermarking consists of hiding of information within a multimedia element such as an image, a text, music or a video clip. Hiding information within other information is called steganography. A TV station's logo may serve as an example for perceptible information. Steganographical methods are needed to integrate non-perceptible information: that means this(More)
SUMMARY This paper describes standards which seek to integr ate security, such as authentication and encryption, into the domain of h ealth care. It also proposes several concepts according to these standards. There are tw o standards which have been developed in the USA. One of these has found accep tance from software developers in Germany. This standard,(More)
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