This paper is the culmination of a three-year study that sought to frame an initial answer to the question. "What are the circumstances and conditions under which National Board Certified teachers (NBCTs) can have a positive impact on low-performing schools. " The study. funded by Atlantic Philanthropies. https://akmfobmkoqh9g.theisblog.com/35130144/vision-based-autonomous-landing-of-a-quadrotor-on-the-perturbed-deck-of-an-unmanned-surface-vehicle