Outflow loading and phase structureSupernova-driven galactic outflows in tall-box Quokka simulations: how their loading and hot and cool phases depend on gas surface density, resolution, and metallicity. Development of Next-generation AMR Radiation Hydrodynamics Code on GPUsBuilding Quokka, a GPU-accelerated AMR radiation-hydrodynamics code: multigroup radiation, an asymptotically correct radiation-matter coupling, and a GPU-optimized particle framework. Massive Magnetically-critical Prestellar Cores and Formation of Large Turbulent Circumstellar DisksZoom-in radiation-MHD simulations of massive prestellar cores at about 10 AU resolution: fragmentation modes, large turbulent disks, and efficient conversion of gas into massive stars. Escape of Lyman Continuum Photons from Resolved Stellar PopulationsHow many ionizing photons escape molecular clouds: the escape fraction rises with cloud density and falls with cloud mass, which points to compact star clusters as the sources of reionization. Understanding Photoionization Feedback in Star Formation from Resolved SimulationsPhotoionization feedback disperses molecular clouds before the first supernovae, and the star formation timescale scales with the crossing time of the HII fronts. RAMSES-RTRAMSES-RT, the adaptive-mesh-refinement radiation-MHD code behind most of my star formation simulations. Analytic Two-point Correlation FunctionAn analytic method for galaxy two-point correlation functions: exact for simple survey shapes and 3-6 orders of magnitude faster than Monte Carlo pair counts. Anisotropy of X-ray Bursts and accretion disk geometryNumerical models of how a concave accretion disk shapes the anisotropy of X-ray burst emission from neutron stars.