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A microcontroller based on alarm device is developed for detecting a combine working station preventing crop conveying pipeline blocked by excessive feed-in quantity so as to avoid driving belt or driving wheel being damaged. An Atmel 89C2051 single chip microcontroller is employed as the core of the device to make the system simple in structure and small in size. Using Hall effect tachometric transducers...
Aerosol samples were collected in 1994 in Singapore on two occasions: once in June during the normal meteorological conditions and later in October during a long haze period caused by the heavy forest fire in Indonesia. Filtration and impaction collection methods were used simultaneously so that detailed elemental analysis of bulk as well as of different size fractions could be performed. Accelerator...
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