The study of health effects on the residents caused by highway mobile source in the central air quality district of Taiwan, ROC

2025-10-15T15:49:03+07:00

This study assesses the externalities in health effect caused by carbon monoxide (CO) and nitrogen oxide (NO_X) from highway transport in the central air quality district, Taiwan. The utilization of typical vehicle emissions, dispersion model and monetary valuation had been adapted and integrated from the EU-based IPA. The outputs include the estimated CO quantities were 269 tons and NO_X quantities were 270 tons in 2005. Then, the prediction of the average ambient concentration obtained by combining CALINE-4 and GIS of CO was 5.9ppm and NO_X is 0.22ppm. The results conjectured for high impact area show that the emissions spread to the leeward side of highway. Moreover, the calculation of damage costs based on dose-response functions had been displayed by GIS grid distribution. Particularly, acute mortality caused by nitrogen oxide, dominate in terms of cost. Ultimately, the results have been scaled up nationwide, total environmental externalities due to CO & NO_X were totalized to USD 37.57 million ~ USD 521.21 million standing for 0.07% of the GDP of the study area in 2005.

A technique for monitoring diesel common-rail direct injection engines used in a bus fleet for preventive maintenance purposes

2025-10-15T16:54:39+07:00

This paper describes an IoT-based technique for gathering the operational data from EURO 4 diesel common-rail direct injection systems used in a bus fleet in real-time, and a methodology to monitor engine technical status basing on these collected data. The engine livedata acquisition system developed in this study has three major parts including OBD-II livedata recorders installed in buses, a local server located in the bus depot to collect daily livedata from the bus fleet, and a web server to store livedata from several bus depots and provides data mining services. By the combination of a local server and a web server, the operational cost can be reduced and the daily livedata can be simultaneously stored in both servers for safety reasons. A pilot system was successfully developed and tested in a real environment. Engine livedata were shown to be collected accurately, precisely, and robustly. The result of this research is an important technical platform to predict the degradation tendencies of sensors, actuators and mechanical components for engine preventive mainteance as well as to provide operational history for engine diagnostics and repair.

VNUHCM Journal of Engineering and Technology

The study of health effects on the residents caused by highway mobile source in the central air quality district of Taiwan, ROC

A technique for monitoring diesel common-rail direct injection engines used in a bus fleet for preventive maintenance purposes