One of the enduring issues of spatial origin-destination (OD) flow data analysis is the computational inefficiency or even the impossibility to handle large datasets. Despite the recent advancements in high performance computing (HPC) and the read...
Social media has become an emerging alternative to opinion polls for public opinion collection, while it is still posing many challenges as a passive data source, such as structurelessness, quantifiability, and representativeness. Social media dat...
In fighting against common threats to human survival and well-being, be they from natural disaster or human conflict, people’s commitment to taking collective action matters and can make a huge or even decisive difference. Throughout human history...