The dynamics of evaporating and non-evaporating drops falling in air under the influence of gravity is experimentally and theoretically studied in this work. Water and acetone drops with diameters 2.0 were tracked for approximately 2 m, corresponding to a flight-time of almost one second....

Economic performance of a city (or region) and its air travel capability are deemed as interlocked in the modern age. It is thus important for planners and stakeholders to understand the changes of the global air transport network. This paper uses a mixed approach, by utilizing both the...

The lockdown policies related with the COVID-19 pandemic brings carbon emissions slump, but emissions potentially restore to increase as lockdown policies relaxed and the economy recovers. In this context, this study aims to explore the changes in carbon emissions and their underlying factors in...