Complex sentence: The initiative's flagship publication, "IEEE Transactions on Cloud Computing" was first published in 2013, and will be followed by "IEEE Cloud Computing Magazine" in 2014 and "IEEE Transactions on Big Data" in 2015.
Split into simpler sentences: The initiative's flagship publication, "IEEE Transactions on Cloud Computing" was first published in 2013,. IEEE TCC will be followed by the launch of "IEEE Cloud Computing Magazine" in 2014 and "IEEE Transactions on Big Data" in 2015.