CyLog/Crowd4U: A Declarative Platform for Complex Data-centric Crowdsourcing
In this paper, the authors present a principled approach to the problems of data-centric human/machine computations with Crowd4U, a crowdsourcing platform equipped with a suite of tools for rapid development of crowdsourcing applications. Using the paper, they show that declarative database abstraction can be used as a powerful tool to design, implement, and analyze data-centric crowdsourcing applications. The power of Crowd4U comes from CyLog, a database abstraction that handles complex data-centric human/machine computations. CyLog is a Datalog-like language that incorporates a principled feedback system for humans at the language level so that the semantics of the computation not closed in machines can be defined based on the game theory.