In recent years, the transition from gasoline to heavy fuel has received more and more attention in the application of unmanned aerial vehicles (UAVs). This study aims to convert a two-stroke port fuel injection (PFI) gasoline engine as the prototype engine to a direct injection (DI) aviation...

The sources and total emissions of 16 PAHs in China were studied. The total PAH emissions in China showed a decreasing trend between 2014 and 2020, from 39236.15 tons in 2014 to 35211.01 tons, with a 10.26% reduction in total emissions. During 2014-2020, household coal combustion has been as the...

Photocatalytic reduction of CO 2 with H 2 O to CH 4 is a promising route to complete the carbon neutrality goal. Nevertheless, one of the biggest challenges for this elegant strategy is that the coupling of the protons and CO 2 to form CH 4 is fiercely competed with proton-proton couplings to...

The mandated increase in segment disaggregation under SFAS 131 could have harmed shareholders by revealing proprietary information or benefited them by reducing agency problems. Using a sample of firms that lobbied against SFAS 131 on the grounds of competitive harm, I examine whether concerns...

In this illuminating study of working life, leading experts in the sociology of work draw on decades of large-scale survey data to consider various notions of the quality of work in the Britain. Exploring data on hundreds of occupations, it charts why some occupations feel more rewarding than...

The economic value of preventing adverse health effects related to air pollution is estimated using contingent valuation in three diverse locations in China. Values are estimated for three health endpoints: cold, chronic bronchitis, and fatality. Alternative statistical models are tested to...