Infectious diseases depend on intensified social intercourse within large cities, resulting in a super-linear allometric scaling law with city size. But how this scaling relationship changes throughout an evolving pandemic is seldom studied and remains unclear. Here, we investigate allometric...

Greater Cairo (GC) is the seventh-largest metropolitan city globally. In recent decades, GC has witnessed massive urban expansion, which has yet to be empirically measured or characterized. This research seeks to explore the patterns of urban growth and changes in urban form in GC from 1973 to...

Adjustment of the pH value is an effective method to control the morphology of nanostructures. In this work, the W18O49 nanowires with crystalline@amorphous homogenous core-shell composite structures were prepared by controlling the pH of the precursor during the hydrothermal reaction. Due to...

Health, as an important human capital, is fundamental for bureaucrats to properly perform duties so as to deliver the function of the state. Based on a nationally representative longitudinal survey and using a difference-in-differences identification strategy, we study whether and how the recent...