Mapping the Dust Obscured Cosmic Star Formation

The comparable strengths of the cosmic optical background and the cosmic IR background

imply that half of the star formation in the universe is obscured by dust: the dust absorbs the 

UV light from young massive stars and re-radiates the energy in the IR.  It is therefore crucial

to observe the IR portion of the background radiation and to understand the evolution of the

high-redshift galaxies that produce the IR background. In this talk, I will present the observational 

work I participated and led in the past few years in understanding the dust obscured galaxy 

populations. In particular, I will highlight the latest results from our ALMA and JCMT surveys.