Origins of Neutral Hydrogen Clouds in Galaxy Groups

I will present the most recent results from my Green Bank Telescope HI observations 
of nearby groups of galaxies. These observations are a search for HI clouds in the 
galaxy groups and along filaments between groups. This study will constrain models 
of the High Velocity Clouds (HVCs) that surround the Milky Way. By observing galaxy 
groups that span the range of interaction and merger activity, we explore the 
contribution of galaxy interactions to the HVC/HI cloud phenomenon. Additionally, I 
will present results from numerical simulations of galaxy groups which show the 
generation of cloud-like structures by galaxy interactions.