  We explore the effects of various plasticity functions on assemblies of
neurons. To bridge the gap between experimental and computational theories we
make use of a conceptual framework, the Assembly Calculus, which is a formal
system for the description of brain function based on assemblies of neurons.
The Assembly Calculus includes operations for projecting, associating, and
merging assemblies of neurons. Our research is focused on simulating different
plasticity functions with Assembly Calculus. Our main contribution is the
modification and evaluation of the projection operation. We experiment with
Oja's and Spike Time-Dependent Plasticity (STDP) rules and test the effect of
various hyper-parameters.
