What is mpda?

Some articles on mpda:

Visual Prosthesis - Ongoing Projects - Tübingen MPDA Project Alpha IMS
... located behind the retina and utilizes microphotodiode arrays (MPDA) which collect incident light and transform it into electrical current stimulating the retinal ganglion cells ... light is not powerful enough to stimulate the MPDA ...
Motion Picture Directors Association
... The Motion Picture Directors Association (MPDA) was an American non-profit fraternal organization formed by twenty-six film directors on June 18, 1915 in Los Angeles, California ... The following year MPDA members helped their fellow directors working in New York City to form their own branch association ... The organization lasted until 1936 when members of the MPDA helped create the Screen Directors Guild, an official craft union ...