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A gesture-based user interface comprises a wearable portable device storing a gesture profile for each of a plurality of different applications on the wearable portable device to define different gestures for the different applications, wherein each of the gesture profiles includes at least one gest

A gesture-based user interface comprises a wearable portable device storing a gesture profile for each of a plurality of different applications on the wearable portable device to define different gestures for the different applications, wherein each of the gesture profiles includes at least one gesture and a predetermined function associated with the at least one gesture; and a profile web service, wherein the portable device is in communication with the profile web service and is configured to download from the profile web service to the wearable portable device a customizable gesture profile for a particular one of the applications, wherein the customized gesture profile modifies at least one of the different gestures, the customized gesture profile comprising personal preferences of the user regarding the modified gesture, including physical attributes of the user.

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1. A system for providing a gesture-based user interface, comprising: a wearable portable device storing a gesture profile for each of a plurality of different applications on the wearable portable device to define different gestures for the different applications, wherein each of the gesture profil

1. A system for providing a gesture-based user interface, comprising: a wearable portable device storing a gesture profile for each of a plurality of different applications on the wearable portable device to define different gestures for the different applications, wherein each of the gesture profiles includes at least one gesture and a predetermined function associated with the at least one gesture, the wearable portable device configured to: receive at least one first signal from an inertial sensor corresponding to a sensed gesture comprising a movement of the wearable portable device;receive from a second sensor at least one second signal associated with at least one of a pressure on the wearable portable device, a temperature range, and an amount of light upon the wearable portable device;compare the first and second signals against the gesture profile and any customized gesture profile associated with the application to identify at least one of a character and a predetermined function associated with the sensed gesture; andin response to identifying the character, display the at least one character on the display, and in response to identifying the predetermined function, execute the predetermined function; anda profile web service that is in communication with the portable device, wherein a user selects a customizable gesture profile from a plurality of stored profiles on the profile web service or creates a new one, such that the profile web service downloads the customizable gesture profile to the wearable portable device for a particular one of the applications, wherein the customized gesture profile modifies at least one of the different gestures, the customized gesture profile comprising personal preferences of the user regarding the modified gesture, including physical attributes of the user, wherein the physical attributes include a specification of a dominant hand and physical dimensions of the user. 2. The system of claim 1 wherein the at least one first signal comprises at least one axis of movement, a frequency, and a force magnitude. 3. The system of claim 1 wherein the at least one first signal has a magnitude that is proportional to sensed movement. 4. The system of claim 1 wherein the at least one first signal comprises two voltage signals corresponding to a movement in the X and Y axes. 5. The system of claim 1 wherein the at least one first signal comprises three voltage signals corresponding to a movement in the X, Y, and Z axes. 6. The system of claim 1 wherein the inertial sensor senses angular motion, and the at least one signal corresponds to angular motion in the φ, θ, and ψ directions. 7. A method for providing a gesture-based user interface for a wearable portable device, comprising: storing on the wearable portable device a gesture profile for each of a plurality of different applications on the wearable portable device to define different gestures for the different applications, wherein each of the gesture profiles includes at least one gesture and a predetermined function associated with the at least one gesture; executing a user interface application on a processor of the wearable portable device, wherein the user interface application is configured to: while executing one of the applications, receive at least one first signal from an inertial sensor corresponding to a sensed gesture comprising a movement of the wearable portable device;sense from a second sensor at least one second signal associated with at least one of a pressure on the wearable portable device, a temperature range, and an amount of light upon the wearable portable device;compare the at least one first and second signals against the gesture profile and any customized gesture profile associated with the application to identify at least one of a character and a predetermined function associated with the sensed gesture; andin response to identifying the character, display the at least one character on the display, and in response to identifying the predetermined function, execute the predetermined function; andproviding a profile web service that is in communication with the portable device, wherein a user selects a customizable gesture profile from a plurality of stored profiles on the profile web service or creates a new one, such that the profile web service downloads the customizable gesture profile to the wearable portable device a customizable gesture profile for a particular one of the applications, wherein the customized gesture profile modifies at least one of the different gestures, the customized gesture profile comprising personal preferences of the user regarding the modified gesture, including physical attributes of the user, wherein the physical attributes include a specification of a dominant hand and physical dimensions of the user. 8. The method of claim 6 wherein the at least one first signal comprises at least one axis of movement, a frequency, and a force magnitude. 9. The method of claim 6 wherein the at least one first signal has a magnitude that is proportional to sensed movement. 10. The method of claim 6 wherein the at least one first signal comprises two voltage signals corresponding to a movement in the X and Y axes. 11. The method of claim 6 wherein the at least one first signal comprises three voltage signals corresponding to a movement in the X, Y, and Z axes. 12. The method of claim 6 wherein the inertial sensor senses angular motion, and the at least one signal corresponds to angular motion in the φ, θ, and ψ directions.