Proceedings Compendium of the Fourth Workshop on Membrane Computing and Biologically Inspired Process Calculi (MeCBIC2010) and of the First Workshop on Applications of Membrane Computing, Concurrency, and Agent-based Modelling in Population Biology (AMCA-POP2010) Satellite Events of the Eleventh International Conference on Membrane Computing (CMC11), Friedrich Schiller University Jena, Germany 23 and 25 August 2010