SARS-CoV-2 is an emergent virus. Specifically how it will adapt to human hosts and populations with growing immunity is unknown. Coronaviruses acquire substitutions more slowly than other RNA viruses ...

Ars Technica has been separating the signal from the noise for over 25 years. With our unique combination of technical savvy and wide-ranging interest in the technological arts and sciences, Ars is ...

The execution ability of teachers is the key to promoting the deepening of educational reform and adapting to educational development. By studying the execution ability of teachers in after-school ...

A powerful, flexible, and modern mathematical expression evaluator written in Object Pascal/Delphi. Parse and evaluate complex mathematical expressions, string operations, logical conditions, and ...