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In this paper, a ubiquitous environment on the basis of the RFID technology to promote user's experience is presented. On such an environment, users have opportunity to get information with handheld device such as PDA about a specific object on a contextaware manner. In addition, users can share with others who had been here on blogs. An example of an art gallery was built at a college in Taiwan. The implementation detail and experience learned were presented.

As the increase of intraoral acidity due to ingestion of sweet foods and acidic beverages usually bring forth a dental caries and a erosion, the measurement of intraoral pH is essential in the study of oral environment. The indwelling intraoral pH telemetry for lasting longer than 24 hours in the mouth was developed to overcome the limits of conventional wire electrode method previously used for salivary and plaque pH measurement, and to assess its effectiveness.