Abstract: An angular acceleration sensor includes a curved track having first and second metallic layers, and a spherical conductive ball provided within the track. The first metallic layer has a constant, uniform, width along a length of the track while the second metallic layer has a varying-width along the length of the track. An angular acceleration experienced by the spherical conductive ball is associated with a change in a capacitance between the spherical conductive ball and the curved track, which is uniquely associated with an external linear acceleration experienced by the sensor.

Abstract: An apparatus for personal health maintenance has a sensor attached at least indirectly to a carrier member in turn attachable to a user or subject and configured for measurement of at least one physiological parameter of the user. A reservoir contains a preselected composition. An electronic processor is operatively connected to the sensor for receiving a signal therefrom encoding a measurement of the physiological parameter, the processor being configured for determining a divergence of the physiological parameter from a predetermined magnitude, the processor being operatively connected to a dispensing mechanism for ejecting, from the reservoir, an amount of the composition to be administered to the user to reduce divergence of the physiological parameter from the predetermined magnitude. The dispensing mechanism includes an expandable polymer composite layer with gas-filled micro-bubbles or microspheres expandable by operation of a heating element.

Abstract: A breathing mask for being worn on the face includes a filtration mechanism configured to filter out particles having a diameter larger than a first predetermined value; a connecting mechanism; and a removable nano-porous hydrophobic membrane configured to be removably attached to the filtration mechanism with the connecting mechanism. The nano-porous membrane is configured to filter out particles having a diameter larger than a second predetermined value, which is different from the first predetermined value.

Abstract: An angular acceleration sensor includes a curved track having first and second metallic layers, and a spherical conductive ball provided within the track. The first metallic layer has a constant, uniform, width along a length of the track while the second metallic layer has a varying-width along the length of the track. An angular acceleration experienced by the spherical conductive ball is associated with a change in a capacitance between the spherical conductive ball and the curved track, which is uniquely associated with an external linear acceleration experienced by the sensor.

Abstract: An apparatus for personal health maintenance has a sensor attached at least indirectly to a carrier member in turn attachable to a user or subject and configured for measurement of at least one physiological parameter of the user. A reservoir contains a preselected composition. An electronic processor is operatively connected to the sensor for receiving a signal therefrom encoding a measurement of the physiological parameter, the processor being configured for determining a divergence of the physiological parameter from a predetermined magnitude, the processor being operatively connected to a dispensing mechanism for ejecting, from the reservoir, an amount of the composition to be administered to the user to reduce divergence of the physiological parameter from the predetermined magnitude. The dispensing mechanism includes an expandable polymer composite layer with gas-filled micro-bubbles or microspheres expandable by operation of a heating element.