Abstract: A Hydrogel Ball includes a flexible housing with a hydrogel inside that retains, expels, and absorbs fluid through holes in the housing. The hydrogel can be modified to bind biomarkers in absorbed fluid, and release them on command. The Hydrogel Ball is configured for use in the oral cavity of an animal to capture, collect, concentrate, and release salivary and gingival biomarkers.

Abstract: A magnetic motion detection method for a helmet system includes an internal body inside a helmet shell that emits magnetic flux and rotates independently. When the helmet shell undergoes rotational acceleration from impact, a magnetic field sensor on the internal body detects acceleration data of the magnetic flux. A controller processes this data to store it, transmit it, or generate triggering signals for airbag deployment when thresholds are exceeded. The airbag system rapidly inflates around the user's neck and subsequently exhausts gas based on predetermined delay or pressure increases.