| 11. | The computer science department at ETHZ has in recent years begun exploring active objects and Bluebottle.
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| 12. | They can interact by requesting things of each other, and of active objects in other threads.
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| 13. | All these characteristics make event-driven active objects a perfect fit for single-chip microcontrollers ( MCUs ).
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| 14. | With over 400 active volcanos, Io is the most geologically active object in the Solar System.
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| 15. | In practice there may be many active objects in a thread, each doing its own task.
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| 16. | Any active object can be manipulated as if it were a passive instance of the same class.
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| 17. | The pachinko balls are not only the active object, but are also the bet and the prize.
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| 18. | A paper by C . Ellis and S . Gibbs distinguishes between active objects and passive objects.
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| 19. | The implementation of active objects in Symbian is based around each thread having a " request semaphore ".
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| 20. | Each subsystem is thus composed of one active object and any number of passive objects possibly no passive objects.
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