dis·ser·ta·tion /ˌdɪsɚ/
  論文
  Dis·ser·ta·tion n.  A formal or elaborate argumentative discourse, oral or written; a disquisition; an essay; a discussion; as, Dissertations on the Prophecies.
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  dissertation
       n : a treatise advancing a new point of view resulting from
           research; usually a requirement for an advanced academic
           degree [syn: thesis]