Byline: Margaret LeRoux From the deck of Fern Nissim's home, the view of Lake Quinsigamond is captivating. On a late summer afternoon, sunlight shimmers on the ripples trailing behind a little motorboat as it putters across the watery neighborhood known as Half Moon Bay. The boat's passing gently rocks a raft, enticing swimmers for one last dive before dinner. The peaceful scene belies its urban location. The lucky souls who live on Lake Quinsigamond can easily pretend the city is far way.