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.
Definition of:MDF (1) (M ain D istribution F rame) A wiring rack that connects outside lines with internal lines. It is used to connect public or private lines coming into the building to internal networks. In a telco central office (CO), the MDF is generally in close proximity to the telephone switch.ee IDF, CDF and wiring rack. (2) (M ultiple D omain F acility) Hardware and microcode supplied by Amdahl that allows the running of multiple system images on a single processor complex. MDF was the first such implementation that did not depend on software such as VM/370 or VM/ESA.