Abstract: A system and method are provided for warning of an exposure of a second individual to an allergen by transfer from a first individual. Movements of the individuals are tracked so that allergen types and levels to which the individuals have been exposed can be obtained. Using knowledge of user sensitivity information to different allergens, it is determined if the first individual has been exposed to allergen types and levels which pose a risk to the second individual by GPS transfer from the first individual to the second individual. Thus, action can be taken when there is a determined risk of allergen transfer between individuals.

Abstract: A pump and methods for compressing a fluid are provided that comprise a pump head comprising a flexible metal diaphragm attached to a rigid compression chamber. Fluid compression is provided within the rigid compression chamber when the flexible diaphragm is mechanically oscillated back and forth by a linear motor operated at a drive frequency that is at or below the mechanical resonance of the moving parts, mechanical springs and gas springs. Tuned ports and valves allow low-pressure fluid to enter and high-pressure fluid to exit the compression chamber in response to the cyclic compressions. The linear resonance pump provides high frequency operation, small diaphragm displacements, and high compression ratios for gases.

Abstract: A pump and methods for compressing a fluid are provided that comprise a pump head comprising a flexible metal diaphragm attached to a rigid compression chamber. Fluid compression is provided within the rigid compression chamber when the flexible diaphragm is mechanically oscillated back and forth by a linear motor operated at a drive frequency that is at or below the mechanical resonance of the moving parts, mechanical springs and gas springs. Tuned ports and valves allow low-pressure fluid to enter and high-pressure fluid to exit the compression chamber in response to the cyclic compressions. The linear resonance pump provides high frequency operation, small diaphragm displacements, and high compression ratios for gases.