With the COVID-19 pandemic, the internet has become a key player in the daily lives of most people. We investigate the relationship between mental health and internet use frequency and purpose, 6 months after the first lockdown in the UK, in September 2020. Using data from the UK Household...

This research focused on the feasibility and stability of applying the forward and reverse combustion approach to the in situ gasification of lignite and bituminous coal with oxygen or oxygen–steam mixtures as gasification agents, especially reverse combustion gasification. A high-quality...

In the paper, a new type of wind-solar hybrid system was proposed, in which multiple small wind turbines took the place of a bigger one. The electricity performance of the multi-turbine wind-solar hybrid system was studied in comparison with the traditional system. Two types of wind-solar hybrid...