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NIST Colloquium Series: Digital Forensics

a camera. The camera always had a light source in the yellow vector here. That was one light source. And then a second light source in one of ...

Video: A Microfluidic-based Hydrodynamic Trap for Single Particles

The control algorithm consists of image acquisition for a particle in the microfluidic device, followed by particle tracking, determination of particle centroid position, and active adjustment of fluid flow by regulating the pressure applied to an... Overall, the hydrodynamic trap is a new platform for confinement, micromanipulation, and observation of particles without surface immobilization and eliminates the need for potentially perturbative optical, magnetic, and electric fields in the... In this device, particles are confined at the trap center by active control of the flow field to maintain particle position at the fluid stagnation point. In addition, hydrodynamic trapping enables confinement of a "single" target object in concentrated or crowded particle suspensions, which is difficult using alternative force field-based trapping methods....

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