# Team:ETH Zurich/project/background/modelingsimple

(Difference between revisions)
 Revision as of 18:53, 12 October 2014 (view source)Lnadine (Talk | contribs) (→Pattern Formation)← Older edit Revision as of 09:05, 13 October 2014 (view source)Eledieu (Talk | contribs) m (→Pattern Formation)Newer edit → Line 1: Line 1: == Pattern Formation == == Pattern Formation == + + === Logic Gate === We want to form a pattern (a motif) on a grid of bacterial colonies. Our output signal is binary: a bacterial colony is either in an on-state or in an off-state. The on-state can be read out by the green fluorescence. We want to form a pattern (a motif) on a grid of bacterial colonies. Our output signal is binary: a bacterial colony is either in an on-state or in an off-state. The on-state can be read out by the green fluorescence.

- Each bacterial colony has two parents. Those parents emit a signal, if they are on. The bacterial colony can differentiate the two signals it gets from its parent. Depending on theignals received by a bacterial colony, it will switch on or off. This is the principle of a logic gate. + Each bacterial colony has two parents. Those parents emit a signal, if they are on. The bacterial colony can differentiate the two signals it gets from its parent. Depending on the signals received by a bacterial colony, it will switch on or off. This is the principle of a logic gate.

Line 13: Line 15: [[File:ETHZurich LogicGate.png|300px|center|thumb|An XOR logic gate.]] [[File:ETHZurich LogicGate.png|300px|center|thumb|An XOR logic gate.]] + + + === Cellular Automata === + + One

## Pattern Formation

### Logic Gate

We want to form a pattern (a motif) on a grid of bacterial colonies. Our output signal is binary: a bacterial colony is either in an on-state or in an off-state. The on-state can be read out by the green fluorescence.

Each bacterial colony has two parents. Those parents emit a signal, if they are on. The bacterial colony can differentiate the two signals it gets from its parent. Depending on the signals received by a bacterial colony, it will switch on or off. This is the principle of a logic gate.

In our project, we are using a particular logic gate, named XOR. Here is an example: imagine your bacterial colonies are either happy or unhappy. If they are happy, they send a signal to their children, inviting them to a party. If a colony is invited to one party (by either of its parents), it becomes happy. If it is not invited to any party, it is unhappy. If a colony is invited by both its parents, it becomes unhappy (because there is here a dilemma).

An XOR logic gate.

One