Abstract: Described are sensors and methods of detecting hydrogen gas. The sensor includes a polymer matrix and a dye molecule in an amount sufficient such that exposure of the polymer matrix to hydrogen gas causes a change in a spectroscopic property of the dye molecule wherein the spectroscopic property includes at least one of color, absorbance, or luminescence. The polymer matrix may further include a catalyst, such as a transition metal, sulfonated Wilkinson's catalyst, colloidal Pt, sulfonated iridium cyclooctadiene triphenylphosphine, sulfonated rhodium cyclooctadiene triphenylphosphine, sulfonated ruthenium triphenylphosphine, or combinations thereof. Embodiments of the sensor may further include a gas permeable, water impermeable membrane, an outer covering, or combinations thereof.

Abstract: The invention addresses confounding difficulties involving continuous sweat analyte measurement. Specifically, the present invention provides: at least one component capable of monitoring whether a sweat sensing device is in sufficient contact with a wearer's skin to allow proper device operation; at least one component capable of monitoring whether the device is operating on a wearer's skin; at least one means of determining whether the device wearer is a target individual within a probability range; at least one component capable of generating and communicating alert messages to the device user(s) related to: wearer safety, wearer physiological condition, compliance with a requirement to wear a device, device operation; compliance with a behavior requirement, or other purposes that may be derived from sweat sensor data; and the ability to utilize aggregated sweat sensor data that may be correlated with information external to the device to enhance the predictive capabilities of the device.

Abstract: The invention addresses confounding difficulties involving continuous sweat analyte measurement. Specifically, the present invention provides: at least one component capable of monitoring whether a sweat sensing device is in sufficient contact with a wearer's skin to allow proper device operation; at least one component capable of monitoring whether the device is operating on a wearer's skin; at least one means of determining whether the device wearer is a target individual within a probability range; at least one component capable of generating and communicating alert messages to the device user(s) related to: wearer safety, wearer physiological condition, compliance with a requirement to wear a device, device operation; compliance with a behavior requirement, or other purposes that may be derived from sweat sensor data; and the ability to utilize aggregated sweat sensor data that may be correlated with information external to the device to enhance the predictive capabilities of the device.

Abstract: The invention addresses confounding difficulties involving continuous sweat analyte measurement. Specifically, the present invention provides: at least one component capable of monitoring whether a sweat sensing device is in sufficient contact with a wearer's skin to allow proper device operation; at least one component capable of monitoring whether the device is operating on a wearer's skin; at least one means of determining whether the device wearer is a target individual within a probability range; at least one component capable of generating and communicating alert messages to the device user(s) related to: wearer safety, wearer physiological condition, compliance with a requirement to wear a device, device operation; compliance with a behavior requirement, or other purposes that may be derived from sweat sensor data; and the ability to utilize aggregated sweat sensor data that may be correlated with information external to the device to enhance the predictive capabilities of the device.

Abstract: The invention addresses confounding difficulties involving continuous sweat analyte measurement. Specifically, the present invention provides: at least one component capable of monitoring whether a sweat sensing device is in sufficient contact with a wearer's skin to allow proper device operation; at least one component capable of monitoring whether the device is operating on a wearer's skin; at least one means of determining whether the device wearer is a target individual within a probability range; at least one component capable of generating and communicating alert messages to the device user(s) related to: wearer safety, wearer physiological condition, compliance with a requirement to wear a device, device operation; compliance with a behavior requirement, or other purposes that may be derived from sweat sensor data; and the ability to utilize aggregated sweat sensor data that may be correlated with information external to the device to enhance the predictive capabilities of the device.

Abstract: The invention addresses confounding difficulties involving continuous sweat analyte measurement. Specifically, the present invention provides: at least one component capable of monitoring whether a sweat sensing device is in sufficient contact with a wearer's skin to allow proper device operation; at least one component capable of monitoring whether the device is operating on a wearer's skin; at least one means of determining whether the device wearer is a target individual within a probability range; at least one component capable of generating and communicating alert messages to the device user(s) related to: wearer safety, wearer physiological condition, compliance with a requirement to wear a device, device operation; compliance with a behavior requirement, or other purposes that may be derived from sweat sensor data; and the ability to utilize aggregated sweat sensor data that may be correlated with information external to the device to enhance the predictive capabilities of the device.

Abstract: Described are sensors and methods of detecting hydrogen gas. The sensor includes a polymer matrix and a dye molecule in an amount sufficient such that exposure of the polymer matrix to hydrogen gas causes a change in a spectroscopic property of the dye molecule wherein the spectroscopic property includes at least one of color, absorbance, or luminescence. The polymer matrix may further include a catalyst, such as a transition metal, sulfonated Wilkinson's catalyst, colloidal Pt, sulfonated iridium cyclooctadiene triphenylphosphine, sulfonated rhodium cyclooctadiene triphenylphosphine, sulfonated ruthenium triphenylphosphine, or combinations thereof. Embodiments of the sensor may further include a gas permeable, water impermeable membrane, an outer covering, or combinations thereof.

Abstract: The invention addresses confounding difficulties involving continuous sweat analyte measurement. Specifically, the present invention provides: at least one component capable of monitoring whether a sweat sensing device is in sufficient contact with a wearer's skin to allow proper device operation; at least one component capable of monitoring whether the device is operating on a wearer's skin; at least one means of determining whether the device wearer is a target individual within a probability range; at least one component capable of generating and communicating alert messages to the device user(s) related to: wearer safety, wearer physiological condition, compliance with a requirement to wear a device, device operation; compliance with a behavior requirement, or other purposes that may be derived from sweat sensor data; and the ability to utilize aggregated sweat sensor data that may be correlated with information external to the device to enhance the predictive capabilities of the device.

Abstract: The invention addresses confounding difficulties involving continuous sweat analyte measurement. Specifically, the present invention provides: at least one component capable of monitoring whether a sweat sensing device is in sufficient contact with a wearer's skin to allow proper device operation; at least one component capable of monitoring whether the device is operating on a wearer's skin; at least one means of determining whether the device wearer is a target individual within a probability range; at least one component capable of generating and communicating alert messages to the device user(s) related to: wearer safety, wearer physiological condition, compliance with a requirement to wear a device, device operation; compliance with a behavior requirement, or other purposes that may be derived from sweat sensor data; and the ability to utilize aggregated sweat sensor data that may be correlated with information external to the device to enhance the predictive capabilities of the device.

Abstract: A method includes collecting roaming connectivity information for a plurality of wide area networks from a plurality of mobile devices, independently of the wide area networks, receiving the roaming connectivity information at a server and relating the connectivity information to the wide area networks and to a plurality of geographic locations to create a roaming network connectivity information database, generating a list of candidate wide area networks to serve as roaming networks for a specific mobile device and a given location based on the roaming connectivity information, and sending a preferred roaming list to the specific mobile device, the preferred roaming list including the list of candidate wide area networks. The method may include receiving location prediction information from the mobile device, and generating the list of candidate wide area networks based on a predicted location.

Abstract: A method includes collecting roaming connectivity information for a plurality of wide area networks from a plurality of mobile devices, independently of the wide area networks, receiving the roaming connectivity information at a server and relating the connectivity information to the wide area networks and to a plurality of geographic locations to create a roaming network connectivity information database, generating a list of candidate wide area networks to serve as roaming networks for a specific mobile device and a given location based on the roaming connectivity information, and sending a preferred roaming list to the specific mobile device, the preferred roaming list including the list of candidate wide area networks. The method may include receiving location prediction information from the mobile device, and generating the list of candidate wide area networks based on a predicted location.