| 1 | <head> |
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| 2 | €а €а €а €а <title>Petri dish</title> |
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| 3 | €а €а €а €а <meta€аhttp-equv="content-type"€аcontent="text/html; charset=windows-1251"> |
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| 4 | </head> |
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| 5 | <body> |
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| 6 | <h2>Petri dish</h2> |
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| 7 | Simulation of life inside Petri dish, where hypothetic unicellular organisms move and reproduce. |
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| 8 | <br><br> |
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| 9 | <h3>List of terms:</h3> |
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| 10 | <ul> |
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| 11 | <li>Cell - a unit of population, described by location in the dish, velocity and lifespan; can carry and transmit mutation </li> |
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| 12 | <li>Petri dish - area of cells' activity</li> |
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| 13 | <li>Asexual reproduction - division of parent cell, which leads to formation of two identical daughter cells; parent cell disappears; no division occurs if there is not enough space to place daughter cells in dish</li> |
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| 14 | <li>Sexual reproduction - formation of four daughter cells instead of two collided parent cells; occurs with certain probability when cells meet; the probability rises as environment conditions worsen; similarly to asexual reproduction, nothing happens if there's lack of space for daughter cells</li> |
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| 15 | <li>Mutation - cell's property, which is transmitted with 100% probability in asexual reproduction process and with lower probability in sexual reproduction process; is caused by user and appears in random cell of population</li> |
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| 16 | <li>Lifespan - time period between appearance and vanishing of cell from Petri dish</li> |
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| 17 | <li>Environment - condition which influences cells' behaviour, is set by user and measured on scale [0:100] (from the worst conditions to the best)</li> |
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| 18 | <li>Collision - situation when distance between cells' centres is less than given threshold; collision leads either to sexual reproduction or change of cells' velocities (their directions)</li> |
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| 19 | </ul>€а |
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| 20 | |
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| 21 | <h3>Initial parameters:</h3> |
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| 22 | Parameters which are defined before the start of simulation. They can't be changed while simulation is in progress |
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| 23 | <pre> |
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| 24 | Number of cells [1-10] - number of cells in dish at start of simulation |
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| 25 | Diameter of Petri dish [100-500] - defines the size of Petri dish |
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| 26 | Cell's lifetime [1-1000] - defines period of cell's life in dish |
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| 27 | Asexual(sexual) reproduction (on/off) - activates or disables chosen type of reproduction |
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| 28 | </pre> |
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| 29 | When you press "Submit" button, simulation is launched. After that this button is replaced by "Stop" button, which can stop the simulation at any time.<br> |
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| 30 | Once there are no cells in dish left, the simulation stop automatically. |
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| 31 | <br> |
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| 32 | <h3>Changeable parameters:</h3> |
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| 33 | Parameters which can be changed at any time |
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| 34 | <pre> |
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| 35 | Environment [1-100] - influences on probability of cell's sexual reproduction |
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| 36 | </pre> |
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| 37 | In addition, by pressing "Add mutation" button you add mutation to living population. |
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| 38 | <br><br> |
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| 39 | <h3>Statistics:</h3> |
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| 40 | When "Show statistics" button is pressed, a window appears with information about: |
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| 41 | <ul> |
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| 42 | <li>values of initial parameters</li> |
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| 43 | <li>total number of cells - number of all cells which lived in dish during the whole time of simulation</li> |
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| 44 | <li>maximum number of cells in dish (at one time)</li> |
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| 45 | <li>maximum number of cells in dish (at one time)</li> |
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| 46 | <li>total number of mutated cells - number of all mutated cells which lived in dish</li> |
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| 47 | <li>number of asexual/sexual reproduction events</li> |
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| 48 | </ul> |
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| 49 | </body> |
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