The developer planning the future campus for a graduate school and research center on the edge of Portland’s Back Cove is shrinking the proposed complex by 27 percent. That comes after residents from a nearby residential neighborhood complained about the potential impact of increased traffic and noise, according to MaineBiz. The Institute for Digital Engineering and Life Sciences, the nonprofit developing the former site of B&M Baked Beans, is reducing the building density to 468,000 square feet and capping the height of any buildings to 170 feet.