[Show abstract][Hide abstract] ABSTRACT: We have explored the design of a playful toothbrush to assist parents in motivating and getting their young children into a habit of proper and thor-ough tooth brushing. Our system includes a vision-based motion tracker that recognizes different tooth brushing motions, and a fun tooth brushing game in which a young child cleans a virtual picture of his/her dirty teeth by physically brushing his/her own teeth.
[Show abstract][Hide abstract] ABSTRACT: The two-color quantum-dot infrared photodetector (QDIP) has been fabricated successfully by the use of top metal contact perforated with cross hole arrays. One transmission peak is located at 4-6 ??m; the other is located at 8-10 ??m . The periodic contact metal hole arrays play double roles, i.e., the top contact and the optical filter. Patterning with lattice constants a = 1.6 ??m and a = 2.8 ??m, the 4- to 6-??m and 8- to 11-??m wavelength ranges can be detected. The two-color QDIP detectivity can be increased up to 1.85 ??10<sup>11</sup> cmHz<sup>1/2</sup>/W at 20 K and the background limited temperature is between 60 K-70 K. It can be applied to fabricate focal plane arrays.
No preview · Article · May 2010 · IEEE Photonics Technology Letters
[Show abstract][Hide abstract] ABSTRACT: Both (1,0) and (1,1) Ag/SiO2 emission peaks generated by the tri-layer Ag/SiO2/Ag plasmonic thermal emitter with square lattice are investigated. The measured results reveal that the emission intensities of the (1,0) and (1,1) Ag/SiO2 plasmon modes depend sensitively on the energy distribution of a gray-body emitter.
[Show abstract][Hide abstract] ABSTRACT: This case study in UbiComp technology and design pre- sents a "Playful Toothbrush" system for assisting parents and teachers to motivate kindergarten children to learn proper and thorough brushing skills. The system includes a vision-based motion tracker that recognizes different tooth brushing strokes and a tooth brushing game in which the child cleans a virtual, mirror picture of his/her dirty teeth by physically brushing his/her own teeth. The user study re- sults suggest that Playful Toothbrush enhances the effec- tiveness of kindergarten children in brushing their teeth, as measured by number of brushing strokes, duration of brush- ing and thoroughness of teeth cleaning. Author Keywords