Rear Admiral David J. HahnChief of Naval Research. Director, Innovation Technology Requirements, and Test and Evaluation. Raised in Tampa, Florida, Rear Admiral David Hahn graduated from the U.S. Naval Academy with distinction in 1985, earning a Bachelor of Science degree in Mechanical Engineering.
Plastic optical fiber (POF) (or Polymer optical fibre) is an optical fiber that is made out of polymer.Similar to glass optical fiber, POF transmits light (for illumination or data) through the core of the fiber.Its chief advantage over the glass product, other aspect being equal, is its robustness under bending and stretching.ne of the most exciting developments in polymer fibers has been the development of microstructured polymer optical fibers (mPOF), a type of photonic crystal fiber. POF fiber also has applications in sensing. It is possible to write fiber Bragg gratings in single and multimode POF.
Medium Density Fibreboard (MDF) is a reconstituted wood panel product. It is a dry-processed fibreboard manufactured from wood fibres, as opposed to veneers or particles, and is denser than plywood and particleboard. MDF has an even density throughout and is smooth on both sides.ike Standard MDF, MR MDF should only be used for interior applications. Being âmoisture resistant' means it is suitable for high humidity areas and occasional wetting-areas such as bathrooms and laundries and for furniture in tropical areas.