Modeling physical processes at galactic scales and above -------------------------------------------------------- 1. Physics of the IGM [1.5 lectures] 1.1 Starting point 1.2 Baryons 1.3 Ionization 1.4 Lyman-alpha forest 1.5 Temperature 1.6 Modeling 1.7 Observations 2. From IGM to CGM [1.5 lectures] 2.1 Large scale structure 2.2 How gas gets into galaxies 2.3 Galactic halos Diversion: cooling of rarefied gases 3. ISM: Gas in Galaxies [3 lectures] 3.1 Galaxy formation lite 3.2 Galactic disks 3.3 Disk stability 3.4 Reynold's layer 3.5 From atomic to molecular gas 3.6 Multa-phase ISM 3.7 Thermodynamics of H_2 3.8 Blitz-Rosolowsky relation 3.9 Cosmic Pandora box: the X-factor 3.10 Cosmic Pandora^2 box: the X-factor in ULIRGS and ODPs 4. Star formation [1 lecture] 4.1 Kennicutt-Schmidth and all, all, all 4.2 Excursion set formalism in star formation 5. Stellar feedback [1 lecture] 5.1 What escapes from stars 5.2 Unconventional marriage: feedback and star formation 5.3 Miracles do happen 5.4 Towards the future