Could magnetic pendulums be combined with calligraphy? Yes, I think they can, and might produce very interesting results.
Magnetic Pendulum Calligraphy (Idea)
Noether’s Theorem
Noether’s Theorem is a central result in theoretical physics that expresses the one-to-one correspondence between symmetries and the conservation laws.
pcdunio MongoDB Cluster
This years X-mas project was to build a little ARM based cluster of pcdunio (Raspberry Pie 2+ like) boards running a MongoDB 3.0 NoSQL database for under $200.