BloodConnect is a NGO that aims eradicating blood shortage problem from our society. We started with the motive to help this organization with their database query management, and provide them with better donor search results so that their hit ratio increases. We worked with their database to device some algorithm which suits them the most. Dynamic querying on the probabilistic database using nearest neighbor algorithms on Rtree data structure is how we sailed across the problem.
Initial report and references are mentioned in initial_report. Please go through it to understand the approach.