A navigation unit on board a mode of transportation is coupled to a communication device for transmitting an emergency call to a remote tracking center when an emergency button on the mode of transportation is depressed. The communication device is not audible or visible at the mode of transportation. Additionally the communication device is capable of being activated from a remote tracking center.

 
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> Catalyst fluidization in oxygenate to olefin reaction systems

> Low Noack volatility poly -olefins

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