In New York, you must be a registered Democrat or Republican to vote in the primary election; a portion of the 16 percent from that district might not know that. New Yorkers registered with a third party, such as the Green Party, Independence Party, Libertarian Party or Working Families Party, can't vote in the primary.
Collaborative filtering (CF) is a method used by some recommender systems. It consists of two senses, a narrow one and a more general one. In general, collaborative filtering is the process of filtering for information or patterns using techniques involving collaboration among multiple agents, viewpoints, data sources.
Collaborative learning is based on the view that knowledge is a social construct. Collaborative activities are most often based on four principles: The learner or student is the primary focus of instruction. Interaction and doing are of primary importance. Working in groups is an important mode of learning.