중세국어 이중모음체계의 변화와 최적성 이론

Change of Middle Korean diphthong system : an OT analysis

This paper examines the change of Middle Korean Diphthong System in accordance with OT principles and particle phonology. As a result, it is discovered that the vowel of Hunminjungeum is classified into mora. Also the change of Middle Korean Diphthong System in OT aims for unmarked simple vowel, that the correspondence among "syllable: nucleus: mora: constituent element" becomes unmarked '1:1:1:1.' The precise example for the change is the simple vocalization of 2 mora Sanghap-ca. But if the Sanghap-ca that changed into simple vowel is the marked secondary vowel, it then is changed into unmarked diphthong, which is 1 mora 2 segment. In all these processes, composing particle and feature showed constancy. The constraints hierarchy that controls the changing process is as follows. (1) Nbranch (nucleus node branching)≫IDENT-IO(S)≫MAX-IO, DEP-IO; (2) IDENT-IO(S)≫Nbranch≫MAX-IO, DEP-IO; (3) Nbranch≫V[-B,+R]≫Mbranch (mora node branching)≫IDENT-IO(S).