Research for a university project. - Bike locks

Agree with the idea of making the bike not usable. Locking the cranks to the downtube as well as to a street post or something? like a figure of 8 lock. The siren is a good idea too. Or a loud voice announcement, "This bike has been stolen" that cannot be deactivated unless with the key to the lock.
Is your project specifically for a bike lock?
How about a full bike where a section of, say, the top tube can be removed, the whole bike then passed through and locked to the post etc?

But then you're talking about the lock being specific to one bike frame which I don't want to do. I want to make a lock that's commercially available and suitable for anyone, and if I incorporate it into the frame, I'm basically doing this:

It had loads of media coverage, but did he sell a single one?

One of my first concept sketches had the top tube on a hinge, but I decided against it..