Replaced TBD's

applications/matlab_vs_python/README.md

 # Matlab vs. Python
 
 This directory contains 5 demonstrations, each of which uses python and Matlab to solve the same problem:
-1. `bloch` - TBD
+1. `bloch` - a simple Bloch simulator that numerically integrates the Bloch equation for magnetisation dynamics
 2. `fitting` - an example of using the Scipy package for fitting a biophysical model to noisy data
 3. `migp` - an example of MIGP dimension reduction prior to group ICA on fMRI data
-4. `partial_fourier` - TBD
+4. `partial_fourier` - a projection-onto-convex-sets Partial Fourier image reconstruction of k-space data that is partially sampled
 5. `rbf` - simple example of fitting/interpolating noisy simulated data using radial basis functions
 
 Each demonstration contain both `Matlab` and `python` code examples so you can compare the implementations.