Selected papers from the 27th International Conference on Transport Theory (ICTT27): Guest Editors.

In the beautifully situated tenth-century castle, about 75 participants from all over the world presented and attended seven sessions during five days concerning such topics as radionuclide production, equations of state of a Fermi gas, the advection-diffusion equation, the Fokker-Planck equation, neutron multiplicity and branching, transport in a moving mesh, pressurized water reactor control rod motion, waves in gas bubbles, the Vlasov-Poisson-Landau kinetic equation, plasma transport, Monte Carlo, stochastic COVID-19 modeling, the BGK equation, charged particle transport, and more specialized topics in particle transport theory. Every odd year from 1969 through 2019 - and then in 2022 on account of the COVID-19 pandemic - a select group of mathematicians, physicists, engineers, and computational scientists calling themselves transport theorists gathered for one week at what was originally called the Blacksburg Conference (now known as the International Conference on Transport Theory [ICTT]). Originated by Paul F. Zweifel (deceased), Bob Erdman, and Chuck Siewert, the conference was intended to bring together theorists the world over to discuss common methods to solve the neutron transport equation with application to nuclear energy. [Extracted from the article]