The Occupational Safety and Health Administration believes chemical odor breakthrough is no longer an adequate, sufficient indicator for when workers should change chemical cartridges. Therefore, OSHA's 1998 revision to its respiratory protection standard, 29 CFR 1910.134, requires users of chemical cartridge respirators to implement a cartridge change schedule based on "objective information o...

Recently, mobile devices penetrate people’s everyday life and become personalized necessaries of human’s life. Therefore, people, today, always carry mobile device anytime and anywhere. Given the current lifestyle, the present paper believes that mobile device evolves to personal life recorder for caching everyday life. The LifeDiary creates daily activity automatically in a time line and allow...